Double Walled and BPA Free. The entire cup is made of food grade AS plastic material. Thickened acrylic interior and insulation provide cold and heat retention, water, iced drinks and juices stay cold while hot drinks like tea, coffee and lattes stay warm. The double-layer construction is sweat-proof so you don't have to worry about drinks or sweat stains staining the cups.
 
Hand Washing Recommended - Because the cups are coated with soft rubber paint, the paint may peel off in the dishwasher, so we recommend you to wash them by hand, and each cup is equipped with a special straw brush, which is easy to clean.