eCoffee cups are made with natural fibre, corn starch and resin. It’s BPA, BPS and phthalate free. The lid and sleeve are made with matte, food-grade silicone which is latex-free and designed for hot liquids. It has a reusable ‘no-drip’ lid. The whole product (cup, lid and sleeve) is dishwasher safe and should last for years if treated nicely. Revolver Cooperative recommend water temperature of 85 degrees for this cup.