The WeatherTech Water Bottle is a reusable, dishwasher-safe water bottle made from BPA-free Tritan plastics. Its compact and durable design makes it great for working out or when you are on the go.The WeatherTech Water Bottle is a reusable, dishwasher-safe water bottle made from BPA-free Tritan plastics. Its compact and durable design makes it great for working out or when you are on the go.