These coolers are great, and I saw them at HS when we were there last fall.
Just a quick warning: at all the coolers I saw, there were signs saying to ONLY use Disney's provided paper cups and not to use your own.
I appreciate the ease of these, but found the small portions of the cups annoying when I wanted to fill my water bottle. I also didn't like the waste of single-use paper cups, which is a big part of the reason I bring my own container. Not a big complaint, and I'm guessing there's maybe some kind of health regulation or they don't want people draining the coolers when a party of 10 all refill their 24oz bottles. Still, something to be aware of.