I purchased this bottle insulator for my Nalgene OTG water bottle, and it fits great. I have used it a few time already but the true test will come this summer to see if this will help keep my water cool in the hot and humid Florida summer. My one negative comment about this product is that the snap is not as secure as I had hoped. After a few uses already and it doesn't stay snapped always. 3 stars

Bought this because I hated the camelback sweating, plus to make it easier to carry with me. It works beautifully -- keeps the moisture down enough I can tote my camelback with ice water in my purse! The material breathes, so it doesn't look like it will develop mold issues inside. Very easy to get it on and off the bottle. Overall, VERY happy with this purchase. 5 stars

Keeps water cool for longer and its handle makes it easy to carry. It is nice looking and protective so even if you drop your bottle it wont get scratched. 5 stars

I bought this to go with the BPA-free water bottle. Awesome, keeps ice water cold during the school day. 4 stars

My daughter loves this bottle, just the right size for carrying to school and just enough amount of water for the day. 4 stars