Stainless Steel 16 Ounce Thermos Thermax Insulation double wall vacuum insulation for maximum temperature retention, hot or cold. Insulated stainless steel cup. Keeps cold 24 hours and keeps hot 12 hours. Twist and pout stopper lets you pour without removing the stopper. Unbreakable stainless steel interior and exterior. Capacity: 16 Oz/ 480 ml.