Fantastic addition to Camelbak and Nalgene

This cover is the perfect complement to my Camelbak Groove, also on my Nalgene whenever he is available. It goes very well on both bottles and is absolutely tight, even with carbonated drinks. He expanded the use of both bottles wonderful. The size of the small hole is quite pleasant to drink, slightly larger than a normal water bottle. I'm concerned, it is likely to be somewhat smaller, but that is absolute matter of taste. The material is a tacky feel, the cover is easy to clean and has no perceptible odor for me.

Would I buy immediately!