The Clean Bottle isn't rocket science, but it is ingenious. The 100% non-toxic, BPA-free Clean Bottle unscrews at both ends to make cleaning a breeze. Even the nozzle is removable, giving germs no place to hide once the scrub brush comes out. Each end of the bottle has a leak-proof silicone washer. And, feel free to stuff the 22 ounce bottle to the gills with ice and drink powders, the wide mouth makes it easy.