Description Double wall vacuum insulated tumbler keeps cocktails at the perfect temperature. Made of high-grade 188 stainless steel with a sweat-proof design. Lid is made from BPA-free Eastman Tritan copolyester. Base of tumbler includes nonslip grip for extra stability. Perfect for outdoor and indoor activities and occasions. Passivated interior protects against corrosion. Product does not retain odors or flavors. Lid is dishwasher safe (top rack), hand wash body recommended. BPA free. Keeps cold for 8 hours. 10 oz. capacity.