Triple-walled thermal insulation retains heat or keeps liquids cold for up to 12 hours The drinking hole is designed for optimum liquid flow Clever one-handed, push-button operation opens and closes the spill-resistant lid Highly durable and made from premium grade 304 stainless steel Wide mouth for added customisability - think fruit, tea or ice cubes Frank Green Ceramic Reusable Cup with Push Button Lid has triple-walled thermal insulation retains heat or keeps liquids cold for up to 12 hours. The drinking hole is designed for optimum liquid flow. Clever one-handed, push-button operation opens and closes the spill-resistant lid. Highly durable and made from premium grade 304 stainless steel. Wide mouth for added customisability - think fruit, tea or ice cubes. Stain and odour resistant ceramic inner layer – taste your coffee and not your cup. Comfortably fits in standard cup holders. Made of BPA-free and FDA and EU-approved materials that leave no residual flavour or odour to drinks. Wash with warm soapy water before and after use. The lid can go in your dishwasher, but the cup needs to be hand washed. Material: Ceramic inner layer and stainless steel outer.