What Our Gearhead(R) Experts Are Saying:"I picked up the BeFree AC Bottle Flip Cap after my original cap took some trail damage, and the silicone mouthpiece made drinking on the move noticeably easier. It snapped right onto my BeFree AC Bottle without any fuss and has been holding up great ever since."A great day on the trail shouldn't be interrupted by a busted cap. The BeFree AC Bottle Flip Cap from Katadyn snaps directly onto the BeFree AC Black and BeFree AC Bottle in all colors, restoring your hydration setup fast so you can stay focused on the miles ahead. The silicone mouthpiece makes drinking on the move easy and comfortable, no unscrewing, no slowing down, no interruptions.