[TalonDJ]

I need to get a smaller one. The big one is great because it also holds enough to use as a day pack on hikes but a smaller one would be good for bike riding or even really long jogs now that I am going to be doing those.

[Penny1]

Yeah, I have a larger camelback that I use for backcountry ski trips and for more remote, long rides. But the one I use for most of my biking is pretty small. It holds 70 oz of water (same as my larger one), and the cargo space has a surprising amount of space for its size. I like the large reservoirs because you never run out of water, and if you have a shorter ride you just don't have to fill it up all the way. If I need more cargo space than either of those, I'll use my small one and carry it underneath a regular backpack.

Definitely go for the brand name ones, too. I have a friend who bought a Nalgene brand (REI's own brand) because it was cheaper, and he said the water tastes funny. I've never had that problem with my camelback brands.

The small one I carry I picked up when they changed the design to one that is not very good. I was glad I managed to snag it, I haven't seen one like it since. The newer design of the rocket:

Rocket

The bigger one I have is this one:

Sno Dawg

It's a bit long for biking because it makes access to jersey back pockets more difficult, but it has nice cargo capacity (better than most of the biking ones I've looked at).