Platypus Water Tank

The zip-lock style closure works great once it's sealed, but isn't the easiest to seal. Also the water tablets we used, and possibly the yellow water as well, caused the water tanks to get tinted yellowish so I'm not sure if those will ever be clear again. Worked well for our needs but may look into something else.

I’ve been using variations on this bag by Platypus for a long time, and they’ve all served me well. I strictly use this bag for carrying water back to camp for later filtering. Sediment settles to the bottom of the bag and the spout makes it easy to fill the pouches of my Sawyer filtering rig. I’ve been using these bags for so long, I had forgotten how absurd the zip-to-lock feature is. I never try to carry these bags full in my backpack. My sympathies to those who’ve tried. I have two of the 4 L bags and I just carry them back-and-forth to camp from the water source. I wish Platypus would have continued making this product, but without the zipper lock. Perhaps it would have gotten way less negative reviews AND could’ve been significantly less expensive.

This bladder is amazing. I love the seal style opening. We had a gravity system for the camp water so it was easy to fill one bag a dump into the big opening. That being said make sure it’s sealed before you put it in your pack..........Had to hang dry some gear.

Will not stay zipped. I filled it to every mark on the bag and it won't stay sealed.

I bought 2 of the 6L tanks last fall and used 1 of them in CO backcountry muzzleloader hunt. It was great for hauling filtered water into our spike camp from a nearby stream but the Big Zip was problematic. I don't think you can actually fill these all the way and still have the Big Zip stay zipped, at least that was my experience. As soon as you pick it up by the handles when full the Big Zip unzips which sorta sucks. Mine might just be a dud and maybe I need to experiment more with it. If it had zipped it would have been fantastic, but even with a partial load and it partly unzipped it still served a crucial role during the hunt.