Works well, but doesn't seal easily (if ever)
This little tank is pretty useful, and has been fairly durable. I've had some Platypus products leak after some use, but this thing is going strong, probably because it never spends time full in a pack getting beaten up.
It does its job well, but sealing the top is an exercise in frustration. I'm not sure I've ever gotten the top of it to seal. The little zip lock top has become the butt of jokes for us, and is essentially just aesthetic.