
I bought this for an overnight camping trip in Arizona. I filled it with ice and then water and put it in an insulating sleeve and backpack. This happened around 5am. I spent the day outside in the sun. I went to bed that night with ice still in my bladder! Today I used it for a hotter hike with my hydration pack. It was shadowless in the mid '90s. I walked 3 hours. When I got home I still had ice cream (albeit a little). I was still totally impressed. Condensation has formed on the outside of the chamber and in the insulating sleeve that evening. However, it was limited by the sleeve and didn't seep into my backpack. I cleaned it when I first got my bladder. I found it easy to clean. Another positive aspect was that it didn't make my water taste funny. If you like cold water on your hikes, this would be a great product for you. Highly recommended and would buy again if needed!

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