Well, gee, I don't see any convenience stores out there, either, so how'd the beer get there in the first place?
Personally, I can't see why anyone would drink beer (or anything fizzy) while riding. Sure, after riding (and untacking, grooming, &c) I might sit back and relax with a good beer, or these days a hard cider, but during? No thanks.
It's really not my preference, either. It's nice to kick back after the ride, sitting around the campfire once the horses are untacked and settled for the night, and enjoy a cold "adult beverage" in some form, but not on the trail.
I'd rather just pack water, or maybe something like Gatorade, but nothing too fizzy. One time I bought what I thought
was flavored water, thinking it would be refreshing. I guess I didn't read the label - turned out to be carbonated, which I discovered when I opened the bottle after several hours on the trail (including gaiting and cantering). It "blew up" and I ended up with lemon-lime fizz all over myself and my horse's neck. He just flicked his ears back at me and continued on as if nothing happened.
The main thing about packing all that "beverage" is how much ice
they pack, too. Sometimes I wonder if people give any thought at all to the total
amount of weight they are asking their horses to carry.
I was at Brown County, IN a couple of years ago, sitting in the campground one morning, watching a group of guys pack up for their ride. It took TWO GUYS to lift the ice-and-beer-filled saddle bags onto the horses' backs. . .and these were NOT skinny little guys, either.
Yeah, the ice melts out and people usually drink all the beer themselves, or give it to their riding buddies during the ride, so that lightens the load a bit, but whenever I hear people say they don't want to weigh their horse down with their garbage, it makes me wonder what they think they were doing when they packed their saddle bags that morning.