With double-wall construction to keep water cold twice as long as other bottles, the insulated CamelBak Podium 3.0 Chill 21oz offers superior performance. Features like its optimized cage fit and cleanability continue to make this BPA-free bottle a favorite among professional and recreational cyclists alike. The Podium 3.0 Chill contains the additive Hydroguard to help inhibit microbial growth inside the bottle. Hand wash only. Key Features Material: Polypropylene Active Ingredient: Silver sodium hydrogen zirconium phosphate Durable double-wall construction Optimized cage fit for smoother cycling Easy-to-clean design Anti-microbial Hydroguard additive with Trutaste BPA-free