HEAVY-DUTY STAINLESS STEEL! Great for Outdoor Events, Beer Promotions, Festivals and Souvenirs! This 16 oz. Stainless Steel Tumbler is made from a new material called "Tasteless SS304" which leaves no unpleasant after taste. BPA free, food grade materials for strength and durability. Also available in Black or White Stainless and a 2 oz. Stainless Steel Shot Glass design.