Stacking Acrylic Tumbler Set 16 Piece is made from Acrylic to provide glass-like clarity and greater durability. Tumbler cups stack for easy storage and they are perfect for indoor or outdoor use. These durable Acrylic tumblers are available in multi-color, Green, Gray and clear, they are BPA free and Dishwasher safe. Set includes: Eight 22 oz. / 650 ml Hiball Tumblers one of each color, Eight 13.5 oz. / 399 ml Double old fashioned Tumblers one of each color.