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