The Cache is a non-stick heat resistant medical grade silicone ashtray, that cleans your bowls and pipes while preventing any buildup on your glass. The durable non-stick silicone material will help extend the life of your glass! Eco friendly Medical grade silicone Heat resistant Dishwasher safe Comes in Solid Colours & Tie-Dye Colours Solid: Black, Dark Green, Glow-in-the-Dark Lime Green & Purple