Tofern High Texture Sport Hydration Tritan Bottle BPA-Free Water Bottle Hiking Cycling Water Bottle Made of American BPA-free Eastman Tritan co-polyester Superior impact resistance, hydrolysis resistant, and explosion-proof Narrow mouth and double leak-proof cover design, to ensure leak-free, and convenient to open and drink Fits in outdoor pack water bottle holders, and car cup holder Excellent and very handy bottle for school, gyms and outdoors.