When I was 19, I lived in West Virginia for half a year or so. I don't remember if it was legal to buy beer at 18 there, or if the shop clerk was just cool, but at any rate, I bought beer there.
One of the items they had, in the refrigerated section, no less, was the "BIG JUG o' BEER!". This was a one gallon plastic jug, like milk comes in, except that it was beer. And it cost like a dollar fifty for one gallon. And it was a bad buy at that, or any, price. I think what the big jug people did was to drain the leftovers out of returned kegs, blend it together, and sell it. Flat, nasty beer.
Original posted at https://rain-gryphon.dreamwidth.org/120827.html