Perfect for summer or winter rides, the Insulated Clean Bottle keeps your cold liquids cold and hot liquids hot. Double wall construction maintains a constant temperature 3x longer than standard water bottles. 100% non-toxic, BPA-free plastic is soft and easy to squeeze. Patent-pending, leak-proof design unscrews at both ends for easy cleaning and drying.. Made with 100% nontoxic, BPA-free polyethylene. Double wall construction keeps liquids cold or hot in any weather. Twist-off bottom cap for trouble-free cleaning and drying. Polypropylene caps with silicone washers for a watertight seal. No more funk, stink or mold. Top-rack dishwasher safe. 10% of all Clean Bottle profits are donated to eco- and cycling-friendly charities that you can vote for at www.cleanbottle.com