I only drink "certified organic" water... LOL

Camelback is a great little company and I love them for many different purposes. They make some of the best small daypacks you can buy and are usually cheaper than non-hydration daypacks even with the added bonus of the hydration bladder.

I use one while hiking/backpacking/camping or even when traveling abroad. I spent a month with the new wife wandering around Peru and each of us had everything stuffed into a large daypack bag and a medium duffel bag.

Some of their models are better than others as far as sweaty-back syndrome is concerned. We met a guy with a really high-end camelback that had a sprung mesh net bit that held the rest of the pack about an inch and a half off of your back so air could circulate. There still were the straps over the shoulders and the belly belt but the small of the back was free to breathe. One of those would be much better for sweat. In the Amazon we sweated all over until we were soaked anyhow so it wasn't that big of a deal. The Inca Trail to Machu Picchu was either too hot or too cold but we were too busy trying to make it over the next pass and getting enough oxygen to care about sweaty backs.

I don't like to wear a pack when riding. It can never be cinched tight enough for me as it tends to want to shift upwards at inopportune moments. I don't like it on a motorcycle either for the same reasons when riding off-pavement and on long sport-touring rides it bothers me with the weight. That's what saddlebags were made for. I do sometimes put the bladder inside my pillion bag but I have to remember to drop the tube before I dismount.