I have used the Camelback and tank bag system also. I just got the Hog Trough setup. The cup is too small for me and the bottle top is awkward on mine it will not stat on full open so you have to bike it and pull to get anything out. But, I have several other bottles that work fine and will e on the lookout for a larger container that will fit. Maybe something around 1/2 gal or more with a tube like the camelback. I would clip the drink tube to my jacket and then just have to reposition my head for a drink and it worked with a full face also.