RTIC 30 oz Stainless Steel Tumbler Cup w/ Splash Proof Lid stainless steel 100% Imported Double wall vacuum insulation maximum temperature retention & insulates hands from the cold Keeps ice longer holds ice for up to 24 hours 18/8 stainless steel strong stainless steel construction Narrow & tall design fits more cup holders. Keeps it hot works great for hot beverages Do NOT place in dishwasher. Hand wash only