Hot or Cold - Stainless Steel Drink Tumbler - Double Wall Foam Insulated - 16oz. Capacity - Stainless For Hot or Cold beverages. Stainless Steel Exterior, Plastic Inner Lining with Foam Insulation in-between. Double wall foam insulation helps maintain your desired drink temperature. Up to 4 Hours Cold, 2 Hours Hot. Screw on Dual Purpose Threaded Lid, Sip for Hot or Straw for Cold liquids. Tranzit Lid versatility allows for secure sealing, quick sipping, or leisurely siphoning through the included acrylic straw. Hand Wash Only. Not for microwave or freeezer use.