America is one of the few places in the world that I have ever been that has milk in a cooler. Everywhere else, it was UHT Pasteurization and sold on the shelves. It, for me was an acquired taste. Since returning stateside, I can't drink milk at all, and limit myself to almond milk.
UHT milk is quite popular in remote areas of Canada, where people have cabins that are off-grid. It’s also popular amongst anyone who works in the bush, such as: prospectors, surveyors, trappers, etc. Same goes for condensed milk in a can, or canned sweetened condensed milk. I developed a taste for it, and preferred it for my coffee for a few years.