It's only a 55oz one, and I can barely shove it into my vest with 32oz of water in it. So it's smaller. But T-34 hops are 2 hrs max so it works for now. I'll re-evaluate when I get farther along if a larger one is a better idea.
It goes in the inside pocket of the vest that was designed for a map I believe. I wanted it on the outside but no joy with the PRs. It has the PALS webbing so it could, but for whatever reason it's a no go.
Dude, water bottle in the map case. It's a good excuse for the IP to take a pass in the pattern so you can drink and decompress. If you haven't started instruments yet, I can't imagine that big ass bladder on your stomach is going to make charts and plates easier to deal with. I still havent figured out how to get more water into the T45.