CamelBak Reservoir Dryer, Grey, One Size
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Questions & Answers
It seems so to me. With any of the divided reservoirs, it won't work, but with the Crux, it seems like it's the newer "open" design.
As far as I know, no. To buy extra, I always have to buy more. I remember it being kind of pricey back then. Handy and hygienic, they're perfect for any situation.