These 16-Ounce tumblers are great for hot or cold drinks - use them for everything, from smoothies to hot coffee drinks. They"re made of durable acrylic. Each tumbler has double wall insulation so your drinks will stay cooler or hotter longer. Double wall also prevents condensation. They"re perfect for on-the-go, indoor and outdoor use and can be used year around. Clear. Set of 4. Hand wash recommended. BPA free. By Boston Warehouse.