Been using my 48oz sleeve for over a month. Works great to keep your bottle cool and also prevents bottle sweat. My bottle took a pretty serious impact last week without any issue. Would highly recommend. Thank you Hardside. I'd rep your brand any day.

Great way to keep my Nalgene bottles cold and protected. I'm glad I found this site. Will definitely make future purchases.

Exactly what I was looking for when I got some 48 oz Nalgene bottles. I coupled these with some bottle carriers and never looked back. After the new wetsuit smell dissipated it (about a day in the air) it was all go. I can carry my bottles easily and the water stays cold for hours. Excellent investment. You won't be sorry for the purchase.

Crucial if you like sipping cold water. Worked well.

Was iffy at first to actually purchase the sleeve because I didn’t think I actually need it. It turned out I was completely wrong and realized I needed the sleeve. It keeps my drink cold throughout the day and keeps my hand from becoming cold when I’m walking around with it. This was a must I didn’t realize I needed and others at my work now want to purchase one as well because how well it works.

I ordered 2 of the bottle sleeves and they do the job of keeping my drinks cold longer. Great fit.