Made of break-resistant, durable BPA free plastic, it holds 16 ounces and has an attractive faceted design. Double-wall insulation keeps drinks colder longer and prevents condensation, and the straw has a stopper so it will not slide out and get lost. The press-in lid helps prevent splashes and spills, and the tumbler fits in most car cup holders, so it is perfect to take on the road. The materials are completely BPA free and can be easily cleaned in the dishwasher. Do not microwave.