Leak-proof scew-off bottom cap. Gone are the days of trying in vain to wash out that funk at the bottom of your bottles. With Clean Bottle, cleaning and drying are easy. * Clean Bottle is made with 100% non-toxic, BPA-free plastics, making it safe to use over and over * Clean Bottle is also top-rack dishwasher safe, so you can run it in the dishwasher without fear of it breaking down * 10% of all Clean Bottle profits are donated to eco and cycling friendly charities that you vote for