It's easy to keep water handy, both at home and on the go: the straw keeps the contents of the tumbler easily accessible, while the press-in lid prevents splashes and has a silicone gasket to keep it securely in place. The tumbler fits in car cup holders for travel, and has a capacity of 16 ounces. It's made with durable, food-grade stainless steel, with a plastic lid and straw, and all the materials are completely BPA free. Hand washing is recommended, do not microwave.