I can't convey how much I love this! I hiked out west last summer. One morning before a hike, I filled this with as much ice as would fit and then finished filling it with water. After hiking 15 miles in 100F temps, the ice was still intact! It was so refreshing. My friend had his water in a Nalgene bottle, and it was hot bath water. Yuck. My water was wonderful! I've had this for over 2 years now, and used it a lot. It has never leaked, and always keeps water cold. I couldn't be without it, and highly recommend it! Slips easily into any backpack too.

This is the second one I own. I find it extremely convenient to bring along while driving (I hang it on the headrest) or traveling. I do not depend on bars or hosting staff anymore.
Armando

Everyone should have one to stay hydrated throughout the day. Should insulate the hose to keep it from freezing.

I've used the Unbottle for 2 years now, and I've found nothing wrong with it except for freezing in the drink tube.

The unbottle is great for travel and lounging. Safe for driving then using straw type bottles. Great for packing when empty. Easy cleaning. And liquid stays cold for long periods.

I was VERY satisfied with this product. You can buy cheaper products that are similar to this, but I must say the CamelBak Unbottle is of superior construction. The seams were very tough, I did not even worry about it leaking or bursting. Bite valve worked flawlessly on my backpacking trip. The nice looking blue case it comes in kept it cooler longer, and the sturdy D rings did not come loose when I tied it to my pack with rope. It is much easier to clean too since it has a wide mouth, and the water did not taste like plastic! I give this product a full 5 stars!

The first time I used the unbottle was on a 4 day backpacking trip into Glacier--on the hottest week of the whole summer. The unbottle made it so we could go from lake to lake and filter what we needed to keep going. It was great not having to stop to drink in the hot sun; it was hot enough in the shade! No leaks, no problems of any sort. Best of all is that in temperatures hovering near 100 degrees the water was cool all day. What a luxury!

This was a great little purchase for me. I use it on my long trips on my Motorcycle, and wearing leather gear can get very hot, so the ability to slow down, flip up my helmet and get a sip of water. So far it has been a great investment on my part.

I strapped the UnBottle to the outside of my backpack with some climbing webbing; the webbing fits perfectly through the 4 plastic clips. It held in place with no problems, and the canvas seems to protect the bladder well.

I recommend this to any serious hiker looking for an easy way to keep hydrated. Like other reviews this is built tough and worth the small expense.