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Rokit giant lava lamp
£295.00 Free Fast Delivery
Rokit giant lava lamp

Mathmos' new giant rocket lava lamp

Rokit giant lava lamp

A new rocket-shaped giant lava lamp from Mathmos; inventors of the lava lamp. Images of cartoon rockets from the past and present inspired this playful design. Rokit is entirely handmade in Britain and comes with a two-year guarantee when you buy direct.

Mathmos Rokt giant lava lamp - Made in Britain

Made in Britain

We proudly make our new Rokit giant lava lamp in Britain.

Mathmos Rokit giant lava lamp - Hand made

Hand Made Metal

The cap and base are hand-spun and polished, and the legs are individually finished giving a handmade feel to every Rokit.

Mathmos Rokit giant lava lamp - Quality

Laser Cut Legs

The laser-cut metal legs have a matt silver finish with an etched Mathmos logo.

Mathmos Rokit giant lava lamp - Lava

Unique Lava Formula

Every Rokit bottle is made in the north of England, then hand-filled in the Mathmos UK lava lamp factory on the south coast.

Mathmos Rokit giant lava lamp - Boxes

Fully Assembled

Rokit's base comes fully assembled with one bulb fitted and two spares.

Mathmos Rokit giant lava lamp - Assembly

Recycled Boxes

Rokit comes in three boxes, a branded base and cap box, a bottle box and an unbranded outer transit box, all made of recycled board.

Mathmos iO lava lamp box
Weight: Body: 3.1 kg, Bottle: 6.8 kg, Total: 9.9 kg
Product size: Height: 66 cm (25.98 inches), Width: 25 cm (9.8 inches), Depth: 25 cm (9.8 inches)
Power: Mains power
Materials: Polished aluminium base and cap - Laser cut aluminium legs - Glass Bottle - Mathmos lava formula

Mathmos astro lava lamp bulb specification
Light: 80w R7s 78mm Linear Halogen Capsule bulb
Mathmos io lava lamp bulb energy label
Lifespan: Approx. 2000hr
Colour temp: 2900K (Warm White)
CRI: 100
Lumens: 1380lm
Consumption: 80kWh/1000hr

Mathmos astro lava lamp children advice


Lava lamps are not toys. Please position them well out of reach of children under 14 years old.


Mathmos Rokit Lava lamp instructions

Rokit Instructions

Rokit Box Contents

This product comes with six components:

  1. Base Assembly
  2. 3 x 80W R7s Bulbs
  3. Glass Shield and Screw x 2
  4. Allen key
  5. Bottle
  6. Spun Metal Cap


  • For indoor use only. Choose a position on a clean, sturdy and horizontal surface.
  • Do not place near sources of heat or cold, such as a heater or air conditioner. The product operates at its best in a room between 20º C / 68º F and 24ºC / 75º F.
  • Keep the cable away from heated surfaces.
  • For best performance we recommend you keep the product away from: sunlight to prevent fading, drafts and cold places to prevent slow operation and freezing, hot places to prevent overheating.
  • Place the base on a stable and flat surface.


This product comes with 8 components:

  1. Avoid handling bulbs with your bare hands, instead use a soft cloth or similar. The oil from hands causes hot spots and may cause the bulb to fail prematurely.
  2. Fit the bulb into the product by pushing one end in and springing it into place between the lampholder contacts. Ensure that each end of the bulb is sitting properly in the lampholder.
  3. Fit the glass shield in position. It is essential that this part is fitted in place before use.
  4. Carefully lift the bottle by the neck and place the bottle onto the heat ring from the front of the product. Ensuring it is vertical and stable.
  5. Fit the spun metal cap in place.


Warm up takes between 1-3 hours depending on the surrounding temperature. Stalagmite shapes may form during the warm up process, these will then melt and the lava will begin to flow.


  • Your Mathmos product will operate best after it has been used four or five times. For the first few times you may see small air bubbles in the lava. Please note the heating time will decrease after several uses.
  • Please do not leave the product on for more than six hours a day or allow it to overheat; this will prolong the life of your product. Overheating will shorten the life of the product; if it is overheating there will be either only one large bubble at the top of the bottle or a lot of very small bubbles.
  • Never move or shake the product when it is in use or still warm, as this causes irreparable clouding.
  • It is normal for the glass to have small air bubbles and moulding scars.

    At the end of its life cycle your product will start to become cloudy, the colors will fade and the lava will not circulate as well as before. This will happen after about 2000 hours of use. Whether your product has reached its end of life or you want a different color combination, visit our website for more information on replacement bottle

    If the bulb is burnt out, replace it with a bulb of the same type and wattage. Only use an appropriate bulb as indicated on the label located on the base. For more information on replacement bulbs go to our website

    IMPORTANT! Allow your product to cool completely before picking it up or moving it. Once your product has completely cooled, use the supplied Allen key to unscrew and remove the screws located on the sides (keep its parts carefully). Carefully lift the cap. Lift and remove the bottle from the base. Place the spare bottle on the product and see the ‘assembly’ section for assembly instructions.


    • This product carries the statutory guarantee of the country of purchase and meets all the applicable standards requirements.
    • This product is only suitable for connection to a 220 - 240V ~ 50Hz mains supply. It must only be fitted with a 3A fuse.
    • This fitting is a Class II, Double Insulated product and does not require an Earth.
    • Place the product well away from children under 14 years to prevent breakage.
    • If the glass shield is broken or cracked then it must be replaced immediately, please contact Mathmos.
    • Use this product only for its intended use as described in these instructions. Do not use attachments not recommended by the manufacturer.
    • Do not use any other means to heat the bottle other than the bulb provided nor attempt to cool it down artificially.
    • Do not operate the product for more than 6 hours a day.
    • The liquids in the product are not dangerous and can be disposed of normally (for details, see our online FAQ’s at If the liquid is swallowed by mistake, drink plenty of water. If any symptoms appear, please visit a doctor.
    • Never use this product if the bottle has been dropped as this will create weakness; obtain a replacement bottle and dispose of the old one. If the contents are spilt, please dispose of as much liquid and lava as you can remove, then use recommended cleaning methods for removing coloured water and wax for whatever floor you have.

    To reduce the risk of burns, electric shock, or injury to persons:

    • Unplug from the outlet before putting on or taking off parts or before cleaning.
    • Never operate this product if it has a damaged cord or plug or if it is not working properly, if it has been dropped or damaged, or if it has been submerged in water.
    • The external flexible cable of this product cannot be replaced. If the cable is damaged, the product shall be discarded.
    • To disconnect, turn the switch to the off position, then remove the plug from the outlet.
    • Never touch the bulb if the product is switched on or if it has just been switched off to avoid burning. To replace a defective bulb, unplug the product and let it cool down sufficiently.

    NB. Mathmos Ltd. cannot be made liable for damage or injury caused by improper handling, installation or use of its products.

    Waste electrical products should not be disposed of with household waste. Please recycle where facilities exist. Check with your Local Authority or retailer for recycling advice.


Rokit FAQs

  1. Q. Where is the Mathmos brand on my Rokit?
    A. The Mathmos branding is on the leg.
  2. Q. I have broken the Rokit glass shield, do you have spares?
    A. Yes. Mathmos lava lamps are designed to last please buy replacement parts here.
  3. Q. Will a Lunar Bottle work on my Rokit?
    A. The Rokit, iO and the Lunar use the same bottles and are interchangeable.
  4. Q. How can I clean my Rokit lava lamp?
    A. The bottle should be cleaned with glass cleaner and a microfibre cloth. Only use a microfibre cloth to clean the aluminium parts. The silicone slots can be cleaned with a damp cloth. Do not use abrasive cleaning products as this can irreparably damage the product.
  5. Q. You don't provide a dimmer with the Rokit?
    A. The Rokit runs best at an ambient temperature between 20 and 25C and under these circumstances will not need a dimmer. Sometimes when the temperature is higher it may be better run the product with the lamp dimmed. Plug-in dimmers suitable for halogen lamps are available and can be used with the product.
  6. Q. Do I need to fit the glass shield?
    A. Yes, this is an integral safety component of the product.
  7. Q. How long should it take for my Rokit lava lamp to warm up?
    A. The Rokit Lava lamp should start working within two to two and a half hours of turning it on. First it will form stalagmite shapes, then they will start to form lava lamp shapes. Please note, new bottles will take longer to heat up (up to three hours), but the heating time will decrease after several uses. As the Rokit use a lower wattage lamp than the iO the lava can perform differently to that model. If your lava lamp does not warm up in this time it may be positioned in the wrong place or the room may be too cold. Lava lamps should be positioned away from drafts and air conditioning. The room should be at least 20 degrees centigrade.
  8. Q. I am having trouble changing the bulb.
    A. Ensure that the product is unplugged and cool. At first glance, the bulb looks too long for the lamp holder, however, the contacts are spring loaded. Locate one end of the bulb on the pin and gently push, the other end of the lamp can then be located on the other pin. Refit the glass shield.
  9. Q. How much does the Rokit Weigh?
    A. The Rokit weighs 12 kg.
  10. Q. What size is the Rokit?
    A. The Rokit is 65.5 cm (25.79 inches) high and 25 cm (9.84 inches) in diameter.
  11. Q. I can sometimes see a blue flash of light from the switch. Is it safe?
    A. It is perfectly safe. As the live current makes contact with the other part of the switch it can occasionally create a small blue flash.
  12. Q. Are the halogen lamps that the Rokit uses not banned?
    A. These lamps are currently exempt under the new UK and EU Eco Design regulations.

General Lava Lamp FAQs

  1. Q. Can I buy replacement parts for my lava lamp?
    A. Yes Mathmos lava lamps are designed to last please buy replacement parts here.
  2. Q. My lava lamp is faulty what can I do?
    A. Firstly read through these FAQs to see if your question has been answered. If not we offer a one year warranty on all our products and two years if bought direct from our websites. If your lamp is within the warranty period, please contact our customer service team who will be happy to assist. Please read our Faulty Product Returns Advice.
  3. Q. Why is my lava lamp cloudy?
    A. Lava lamps become cloudy for two reasons; either they have been shaken or moved whilst hot or they have reached the end of their life (2000 hours). You can purchase a replacement bottle for your lava lamp here.
  4. Q. Why does my lava lamp have specs and bubbles in the glass?
    A. Mathmos lava lamp bottles are manufactured in one of the highest quality automated bottling factories in Britain. Small bubbles are a normal part of this manufacturing process, it is not a fault.
  5. Q. What are the differences in quality between a Mathmos lava lamp and others?
    A. A different lava formulation giving better lava flow, longer life, clearer liquids and more vivid colours. The metal parts are of a thicker, higher grade metal allowing us to hand polish them to a high shine. Our bulbs are directional taking the heat away from the base and directing the light into the lava. We have a higher standard of safety and build quality audited by a number of different bodies. We provide a comprehensive range of spare parts unlike other throw away products. We have 56 years of British manufacturing excellence to draw on.
  6. Q. How long should it take for my lava lamp to warm up?
    A. Lava lamps should start working within an hour to an hour and a half of turning them on. First they will form stalagmite shapes, then they will start to form lava lamp shapes. Please note, new bottles will take longer to heat up (up to three hours), but the heating time will decrease after several uses.
  7. Q. My lava lamp just has one large bubble sitting at the top of the bottle that does not move?
    A. The lava lamp is overheated. It could have been on too long (more than 8 hours), so please turn it off and allow it too cool. Or it is positioned in a room that is too hot (more than 24 degrees) or next to a heater. Please reposition your lamp.

    lava stuck at the top

  8. Q. How should I recycle my lava lamp bottle when it reaches the end of its life?
    A. Please make a hole in the metal cap with a sharp point, then pour away the liquid. The bottle may then be recycled through your local recycling centre.

    bottle throw away - dispose bottle

  9. Q. Can I buy new liquids for my lava lamp?
    A. Lava lamp bottles are a sealed unit and should not be tampered with. We do not sell the liquids separately, but you can buy a new bottle and contents for Mathmos lava lamps here.

    lava lamp liquid - new liquid lava lamp - refill - buy new liquids - buy new wax - buy new lava

  10. Q. Can I buy a new cap for my lava lamp bottle?
    A. Lava lamp bottles are a sealed unit and so we do not sell the cap separately, but you can buy a new bottle and contents here.

    lava lamp cap - cap lava lamp - buy cap

  11. Q. Why is my bottle not sitting straight in the base?

    Bottles are now supplied with a lip which runs around the lower part of the bottle, to ensure it will sit straight in the base. When the bottle is placed on the base, it should sit securely, although it will still be possible to move the bottle from side to side and a shadow gap may be visible.

    There are minute variations in bottle and base size over time so it may be that occasionally for some much older products a new bottle does not fit in the base. If your bottle isn't sitting in the base, please contact our customer service team.

    wonky lava lamp - wonky bottle - bottle wonky

  12. Q. How long do lava lamp bottles last?
    A. Mathmos Lava lamp bottles last for approximately 2000 hours of use. After this you can buy a replacement bottle here.

    lava lamp lifespan - lifespan lava lamp - lava lamp last

  13. Q. Where can I buy replacement bulbs for my Mathmos lava lamp?
    A. Mathmos have large stocks of replacement bulbs for our lava lamps available here.

    which bulb - buy bulb - which bulb do I need - broken bulb - faulty bulb

  14. Q. What is Mathmos doing about halogen bulb phase out?
    A. Don't worry whilst some halogen bulbs are being phased out for lighting purposes Mathmos uses halogen bulbs primarily to heat its lava lamps rather than to light them; so the use of halogen bulbs in our lava lamps is part of a special purpose exemption under current regulations. We have large stocks of these special purpose bulbs and we also have an ongoing supply. We also have alternative ways of powering our iconic lamps should there be further changes to the regulations in the future.

    bulb - halogen

  15. Q. Why don't you do replacement bottles in the colour I want?
    A. Mathmos have made a huge number of colourways over our long history, it is not possible to keep all the colours in stock. Please choose from the current range and sign up to our social media channels to be notified of limited releases of other colours.

    bespoke refills - bespoke colours - custom colours - custom refills - bottle colours - custom lava colours - bespoke lava colours - bespoke bottle colours - special colours

  16. Q. Do you offer custom refills?
    A. We are not able to offer this service on an ongoing basis however if you sign up to our social media channels we may issue selected annual dates for collectors to have bottles refilled.

    bespoke refills - bespoke colours - custom colours - custom refills - bottle colours - custom lava colours - bespoke lava colours - bespoke bottle colours - special colours

  17. Q. Why has my lava lamp made strange stalagmite shapes?
    A. This is a normal part of the warming up process. Please leave it on longer and then it will start to form moving lava shapes.

    strange lava - lava sticks

  18. Q. My lava lamp is not lighting up?
    A. Please check that your bulb is working. You may buy a new bulb here. Alternatively, please check the integrity of the fuse in the plug.

    lava lamp broken - lava lamp doesn't work - broken bulb - faulty bulb

  19. Q. Can I buy Mathmos lava lamps for delivery to the USA and Canada?
    A. Not at the moment but please sign up to our USA mailing list to be notified when you can buy from us here.

    usa lava lamps - canada lava lamps - lava lamps usa - lava lamps canada - america lava lamps - lava lamps america - lava lamp usa

  20. Q. Why can I see bubbles in the lava?
    A. Small bubbles in the lava are normal particularly when you first receive the lamp. As you use this over time the bubbles will reduce.
  21. Q. Why has the liquid in my bottle gone clear?
    A. Over time the dye in the lava liquid will fade, particularly if it is positioned in direct sunlight. If you lamp was bought within warranty and the instructions were followed please contact our customer service team. If your lamp is out of warranty you can buy a new bottle here.

    liquid clear - clear liquid

  22. Q. The liquid level of my lamp is too low. Can I top it up?
    A. No Mathmos lava lamp bottles are sealed units. Do not attempt to take off the cap and on no account top up the liquid. The heat from a lava lamp causes the liquid to expand and topping it up could cause the lamp to be overfilled and put pressure on the glass as the liquids expand. If you are not happy with your bottle buy a new one here.

    liquid low - liquid refill - top up liquid

  23. Q. Why is there wax sticking to the side of the bottle?
    A. If you use the lamp a few times this wax should join the rest of the lava. If this does not happen and your lamp was bought less than a year ago please contact us here. If you lamp is over a year old please buy a replacement bottle here.
  24. Q. Do you offer any colours in addition to what is shown on your website?
    A. No, however we do constantly add new colours so sign up to our mailing list to be notified of new colours as they are released. We do occasionally release short runs of special colours, please sign up to our social channels to be notified.

    bespoke bottles - special bottles - custom bottles - custom colour

  25. Q. Why can I see a metal spring coil floating in my lava lamp bottle?
    A. The metal spring is an essential component of a lava lamp bottle. However it should be sitting at the bottom of the bottle. Run the lamp for several hours and hopefully the spring will settle in its right place.

    metal coil in bottle - metal spring in bottle

  26. Q. Why can I see a foreign object in my new lava lamp bottle?
    A. There should not be anything other than lava and liquid in the bottle. Sometimes you can see darker specs in the lava as it is flowing. Each batch is individually made and these are dye particles that are sometimes present. These often fade over time. If you see anything else in your bottle, please contact customer services here.

    hair in lava lamp - hair in bottle - dirt in bottle - dirt in lava lamp

  27. Q. How old is my Lava Lamp?
    A. There have been many small changes in the manufacture of Mathmos lava lamps over our long period of production. Dating lava lamps is not something we can do for you. You might want to visit one of the specialist sites such as to begin this process.
  28. Q. How can I clean my lava lamp?
    A. The bottle should be cleaned with glass cleaner and a cloth. The base and cap is aluminium so please use recomended products. If in doubt just use a soft cloth.

    clean lava lamp - polish lava lamp

  29. Q. My lava lamp broke on the floor. How do I clean it?
    A. Dispose of as much liquid and lava as you can remove from the floor. Then use recommended cleaning methods for removing coloured water and wax for whatever floor you have.

    bottle smashed - smashed bottle

  30. Q. Can I buy Bayonet fitting bulbs for my 1960s lamp?
    A. Yes you can, we had these specially made to ensure our 60s lamps can still be enjoyed, see here.

    bayonet bulb

  31. Q. The replacement bottle I ordered doesn't fit my lamp. Can I change it?
    A. Please contact customer services here.

    replace - change bottle - ordered wrong bottle

  32. Q. Can I buy new liquid and wax?
    A. No please buy a complete new bottle here.

    refill - liquid refill - refill liquid - refill bottle - bottle refill - buy liquid refill - buy bottle refill - buy new liquids - buy new wax - buy new lava

  33. Q. What is the lifespan of a bottle or bulb?
    A. Mathmos lava lamp bottles last 2000 hours. The life of the bulbs vary depending on usage but replacement bulbs are available to buy from here here.

    how long bottle - how long bulb - broken bulb - faulty bulb

  34. Q. Where is the Mathmos brand on my lava lamp?
    A. The Mathmos brand is on the plastic base and either printed on the product itself, on a brand label on the lead or etched on the glass.

    brand - logo - where

  35. Q. Why is there is a small gap between the base and the bottle?
    A. Some lamps have a shadow gap between the base and the bottle; this is normal.

    gap - base - bottle - rim

  36. Q. How do I recycle my lava lamp base?
    A. Why not buy a new bottle and bulb and reuse it? If you must recycle it, please take it to your nearest household recycling centre which has facilities available for recycling electrical waste.

    recycle - dispose

  37. Q. Why does my lava lamp colour look different to the picture?
    A. Mathmos lava lamp bottles are made by hand so there will be small variations in colour. Also bear in mind that colours look very different in the dark and in the light, our photographs are taken in the light.
  38. Q. Do you supply lamp holders for my base?
    A. Due to electrical safety regulations we are unable to supply lamp holders I’m afraid.
  39. Q. Has the formulation of Mathmos lava lamps changed?
    A. The formulation has improved since the 1960s making our lamps less likely to cloud in the heat or freeze in the cold. However we have not changed the formula in many years.
  40. Q. Why does my lava not flow / make lava shapes?
    Check your bulb is working
    Check you have positioned the lamp away from drafts, air conditioning or a window. Try the lamp in a new position in the room.
    Make sure the room is at least 20 degrees centigrade.
    The lamp will take longer to warm up the first few times; run the lamp for 4-6 hours each time.
    If you have an older base check the correct light source is fitted: see bulb section for the possible bulbs here.
    Check there is a coil at the bottom of the bottle.
  41. Q. What should I do if my lava lamp has been moved while being on and is now cloudy?
    A. Clouding in a bottle which has been moved when it is in use or still warm is irreparable. You can try and run the bottle for a few times to see if this will improve it. If this does not help, you can buy a new bottle here.
  42. Q. How do I fit my halogen bulb?
    A. See instructions here

Rokit Giant Lava Lamp

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