This microwave kiln allows you to melt glass in a standard microwave oven to create jewellery, or glass components for jewellery and other creative purposes. This technique of 'glass fusing' is now available for everyone. With the microwave glass kiln there is no need to buy a special, expensive fusing kiln, any simple, cheap microwave will do the job.The HotPot kiln is made of Bio Soluble fibre, which is ultra light and nonhazardous. The lid has a special black coating on the inside that makes it possible to obtain extremely high temperatures inside the pot, causing the glass to melt within several minutes. We recommend that you use a different microwave oven to the one you cook food in. MICROKILN SAFETY WARNINGS: 1. Kiln and contents become extremely hot. Handle with care. 2. Always use gloves, such as oven mitts or leather work gloves when handling a hot Microkiln. 3. Always pick up and hold the MicroKiln by both the base and top using both hands. 4. Remove Microkiln immediately from the microwave oven after it is finished firing. 5. After removing the Microkiln from a microwave oven do not set the Microkiln down on top of or in proximity to any surface that is flammable or that could melt, such as a kitchen counter or the top of the microwave oven. 6. Always wait at least 20 minutes after the Microkin has come out of the microwave oven before attempting to open the Microkiln. 7. Always follow the manufacturer's instructions that came with the microwave oven for safe operation of the microwave oven. 8. Vent the microwave oven properly if firing any toxic materials in the Microkiln. 9. Keep the Microkiln out of the reach of children. 10. Use at your own risk and follow all recommended and common-sense safety precautions.