Kendal Glass Tabletop Siphon (Syphon) Coffee Maker 5 Cups Both chambers are made of heat resistant glass. It is light weight and safe. The difference in temperatures it can withstand is 300F. The gasket is made of silicon, safe and durable. Attached with a cover for holding the upper chamber. Comes with coffee powder plastic spoon and bamboo stirrer. Rinse bamboo stirrer right away after use, or it would be stained. Cloth filter is reusable by cleaning after each use. Wash the new cloth and dry it out before using it.