Misplaced your Bivo Nozzle? Or just fancy a spare in the kit drawer? No problem. This is the replacement nozzle for your Bivo bottle, so you can get back to drinking on the move without buying a whole new bottle.
Keep one in reserve and you're never caught short on a ride. It's a small part, but it's the bit your bottle depends on every time you reach for a drink, so having a backup to hand is simply sensible.