RTIC Jugs are stainless steel, double wall vacuum insulated. Keeps your drinks ice cold longer - works great for hot beverages. Extra wide opening for easy filling, drinking and cleaning. Made with durable kitchen-grade steel. Features & Technology Dishwasher Safe Keep lids in the top rack to prevent damage Double Wall Vacuum Insulation Maximum temperature retention & insulates hands from the cold No Sweat Exterior The outside stays dry. No need for a coaster 18/8 Stainless Steel Strong stainless steel construction Keeps Ice Longer Holds ice for up to 24 hours Keeps it Hot Works great for hot beverages Air Tight Seal Heavy duty lid seal locks in the cold