Bottle adaptor and outlet barb with replaceable activated carbon cartridge Reduces chemicals and improves taste of treated/filtered water Attaches directly to outlet hose of most popular water filter brands Bottle adapter fits on top of most popular bottle brands Made in Switzerland Bottle adaptor and outlet barb with replaceable activated carbon cartridge Reduces chemicals and improves taste of treated/filtered water Adapter connects to all popular water bottles Can be used with most water filters Barb fits bite valve of most hydration packs for easy filling; Sport type: Camping & Hiking Bottle adaptor and outlet barb with replaceable activated carbon cartridge Reduces chemicals and improves taste of treated/filtered water Adapter connects to all popular water bottles Can be used with most water filters Barb fits bite valve of most hydration packs for easy filling