Insulates hot beverages up to 6 hours Insulates iced drinks up to 24 hours Durable, double-walled construction High performance vacuum insulation 18/8 food-grade stainless steel, no liner 100% stainless interior (stainless caps) Extra wide mouth for easy filling and pouring No BPA, phthalates, lead, or other toxins does not retain or impart flavors Rounded corners are easy to clean with no hard ang