I have the Lat 64 bag. It has many spots for water, if you think a bit differently. One dedicated bottle holder, and enough pocket space for 9 or more long necks or 0.5L bottles, should you want to fill it that way. And it will still carry 22 discs. I know what you mean, though, it doesn't have two big holders on the outside.
Personallly, I like the end putter pocket, so I sacrifice the 2nd bottle holder. It is easy to access your putters and marker while it's on your back. The end pockets are huge, can hold 4 discs or 3 putters each. The front (back?) pocket can also hold 3 discs. But, as I said, any of these three pockets can be used for add'l beverages. I just switch out the empties...
It does hold alot of cargo, and seems very durable. Plenty roomy for towels, shirts, jackets, discs, food, beverage, and whatever else. I've had it a few months now, so far, so good. I'm fairly tough on equipment so next year we'll see. Of course, this tough construction makes it heavy.
But I like having a small, lighter bag, which is a Fade Crunch Box, in my case. Nice for the casual rounds, short courses. Actually, I just used it on two very hot days, so I didn't have to carrry alot, put an extra bottle in the big end pocket, couple of microfiber towels, and a cell phone and I was set. Didn't miss anything.
