Review on 3L Hydration Bladder: Leakproof Water Storage Bag for Hiking, Camping & Cycling - 3 Liter Reservoir with Insulated Sleeve, Perfect Replacement for Backpacks by Timothy Kiley

I like this bubble BUT I quickly realized I had a problem! First, the wonderful aspects are easy to fill. Easy to deflate and clean/dry, there is a bar to keep my pack upright, an insulated and easy to use hydration tube (see instructions for use as the tube has an open/closed aspect). I quickly realized why I couldn't use it. I can't open it to empty my bladder after a hike! If you don't tighten it to the max it will lick, but if you do it will take a gorilla to open it! I wish they would reverse engineer this issue, but so far it's not working for me.