Kicks the S**T out of other bladders
Love Platypus and will never buy a different brand of bladder again for these reasons:
Indestructible-I have had one for more than 10 years now and is still going strong
Zip top: never leaks, easy to to mix drinks in and put ice in.
Valve: doesn't need a shutoff valve like other brands because the nipple never leaks.
Buy this brand and you will never go back.