Polar Bottle Insulated Water Bottle (zipstream orange & blue breakaway combo, 24- 2pack) Double-wall construction; a thermal barrier of air keeps heat out and cold in 100 percent BPA-free and Phthalate-free Fits standard bicycle water bottle cages Wide mouth allows ice cubes easily into the bottle and makes cleaning easy Dishwasher and freezer safe Powerful, fast hydration when you need it most with the Polar Bottle zip stream high flow cap. The cap's self-sealing valve allows pressure to build inside the bottle when squeezed - releasing a powerful burst of water. The valve also prevents the bottle from leaking even in the open position, allowing you to access your water quicker than ever before. Believe us, you'll be happy to have it on your next long ride.