cjcsHi cjcs, I currently own one, and no, I can't seem to fit any water bottle on the side pockets. There's a bottle pocket inside the rucksack though, which fits most sizes.
EDIT: I took pictures and a spray can fits just snuggly in the side pockets, although I imagine you can fit in another 1/4 inch diameter there. 2nd picture with glasses for reference, or a very rough estimate of 1 inch radius for the can.
EDIT: I took pictures and a spray can fits just snuggly in the side pockets, although I imagine you can fit in another 1/4 inch diameter there. 2nd picture with glasses for reference, or a very rough estimate of 1 inch radius for the can.