Insulates hot beverages up to 6 hours and iced drinks up to 24 hours * Durable, double-walled construction, high performance vacuum insulation * Slim design fits in most cup holders, made of 18/8, food-grade stainless steel, no liner needed * 100% Stainless interior, extra-wide mouth, no BPA, phthalates, lead, or other harmful substances * Doesn"t retain or impart flavors, reusable and recyclable, easy to hand wash