I love this bladder. I have used just about every brand out there now and this is the only one that didn't give the water a bad taste for weeks. I heard you didn't have to wash it with anything special just rinse and go. I thought ya right but I tried it anyways. Gave it a quick rinse out with water then filled it up and no bad taste at all.
The Features YO!!
* The bite valve on this thing is also much better than the cambelback ones.
* The hard spine that runs down it really helps also. Nothing I hate more hiking around is when my water would get low in my other bladders and they would sag causing it difficult for the last bit of water to come out. The spine helps ensure you get that very last drop with ease.
* This thing is also super tough and I'm not worried about tearing it while ducking a tree like I did with a competitors brand.
* Nice wide easy to fill mouth and screws tight.
Bottom line.... I have replaced all my other bladders in my pack, my fiances pack and my families packs with these and will never look back. I'm so happy Osprey teamed up with Nalgene to make this happen.