Mason Jar Tumbler, 18/8 Stainless Steel, 30oz. Capacity - Matte Black A new twist on a classic design. These Tumblers have the same feel as those nostalgic old time glass mason jars but are made from 18/8 Stainless Steel. Safer for use around the swimming pool, at the beach, and in the hands of young ones. Single Wall, Large 30oz. Capacity for Cold Beverage Drinks. Threaded Stainless Lid, with Silicone Gasket Seal, and Black plastic Straw included. BPA Free Hand wash. Not for microwave or freeezer use.