Camelbacks are very nice, I had a few while I was in the military and they were issued for free when we went to the desert. But, they are hard to clean, ie the tubing and everything. I feel like they must become a breeding ground for bacteria very quickly and the bottle and tubing parts probably need to be changed out every few months, which might get pricey. They're great for hands-free convenience. I hope that's what you're referring too anyway, those backpack type camelbacks?
We recently bought Siggs and really like them. The "sports ca one is kind of hard to use because you have to kind of push your lips down on it, the twist off cap with the loop in it (standard) has to be twisted a number of times and then the mouth hole is kind of wide for me, so its kind of a pain at the gym because I end up nearly falling off the treadmilll messing with twisting the cap on and off, then slop the water all over me when i try to drink from it. The kids caps are the best, I would love one for my own Sigg. the kids bottles are the best all-around, cute designs, I get lots of compliments on it, my son loves it.
