Thermos Nissan Stainless Steel Backpack Tumbler. TherMax double wall vacuum insulation for maximum temperature retention. Unbreakable stainless steel interior and exterior. Steeping lid lets you brew coffee or tea anywhere. Leak-proof lid for no-spill transport. Cool to the touch with hot liquids. Non-slip, scratch-resistant base. Includes sipping lid for drinking. Capacity: 12 oz/.35 L.