I have been doing training for a trail marathon and found I have to carry a hydration pack, I drink a LOT and those little bottles don't even touch what I need. for short runs I carry a little pack around my waist with one bottle or a hand held bottle carrier, but after about 30 min those are empty. The one around my waist does not bother me - and I don't like things around my waist either, but this is nice and I can put my keys in the pocket and some toilet paper, the pocket is small so not much else fits.

The hydration pack is not bad, when I bike to work I use the same backpack as when I run, to carry clothes, etc. I have a smallish back pack and bought a big camelback not the bladder, this is covered with nylon and you can put it in any pack or attach it to the outside of a pack, not sure what it is called.

To keep it from sloshing around fill it up with water, blow all the air out of the tube (into the bladder) then turn the bladder upside down and suck all the air out!

The hydration packs are expensive and this was a cheaper way to go since I had already bought the pack. It takes a little bit to get used to but now I love it! it is a little hot BUT I have water! and that is more important to me, I run trails so I never get tooo hot.