Review on WACOOL 3L 3 Liter 100oz BPA-Free EVA Hydration Pack Bladder with Leak-Proof Water Reservoir by Chris Drury

I must say they work much better than described! I tested them just because I could and was pleasantly surprised. No leaks to be found! I bought two of these, one for my husband and one for me because we hike a lot! We're both in the military and wanted something that would hold up as well as a camelback bladder for a fraction of the cost. All bladders we have used in the past have leaked, some on the first use! I was a little suspicious of trusting another. These reservoirs have served us well so far and have been through numerous cleanings and refills since purchase. Still no leak! The gliding hole was where I thought the leaks would start. Nothing yet. bone dry. That is, after filling and drying in the open air. LOL They are easy to clean and easy to dry between uses. If you buy this bubble you will not be disappointed!