Description of Camelbak Podium Chill Jacket Insulated 21oz Bottle The CalmelBak Podium ChillJacket Bottle is a soft, lightweight, easy-to-use insulated bottle to keep beverages cool for cyclists, runners, and other outdoor athletes. Features: Double-wall construction with ChillJacket thermal insulation Podium Bottle cap includes the revolutionary self-sealing JetValve that flows easily yet seals shut automatically Made of taste-free, BPA-free polypropylene Best-in-class soft, squeezable bottle Bottle lined with exclusive Hydroguard antimicrobial treatment Large 620ml (21oz) volume Secure lockout on cap for transport or mixing powdered beverages