evo.com | Bivo Bike Water Bottles > The Bivo Dusty The Dirt Cap is here to keep all that mud, dirt and gunk out of your water bottle's nozzle. Made from food-grade silicone and designed to be attached/removed with one hand. Does not affect nozzle function. Fits all Bivo bottles with Gravity Flow nozzles. One-Hand Operation LFGB Compliant Food-Grade Silicone | Bivo Dusty The Dirt Cap 2025 - in Black