Alright found it. My team uses the "Camelbak Lobo"
Ours doesn't have yellow on it, it's black. I have nothing to say but good things about that camelbak, it sticks to my back and carries enough water... believe me running paintball as hard as we do in June Texas heat requires A LOT of water. We did have a special need that I'm sure you don't have though. Unlike the full back design like Team_Infidel uses, ours had to be compatible with this buttback.
So we wear the buttback around our waists and ours are actually even bigger, housing 9 tubes of 140 paintballs. So the Camelbak we chose had to fit under that buttpack so it wouldn't interfere with the ammo tubes and the Lobo fit the bill perfectly.
Another feature of the Lobo that really helps out is the little pouch at the bottom. My team uses GMRS radios with headsets so we stick the radio in the pouch at the bottom and run the headset out into our masks so we can talk to eachother without having the radio on our front where we can fall on it when diving or on the hip where it can fall off.
So that's why we went with the Lobo from Camelbak.