Designed to keep you cool on your rides by providing cold liquids through the use of highly reflective foil within the bottle. Reflective foil also doubles as a safety reflector while in motion Features an auto shutoff valve to prevent spills Bottle body mates up perfectly with Dawn To Dusk cages Bottles are BPAFree, Biodegradable, Phthalate-Free and are recyclable With Dirt Mask for clean, dirt free hydration