Target has wine in 375 ml single-serve cartons similar to juice boxes. My local grocery store has "Bandit" brand wine in 500 ml cartons, and I think they have smaller ones also in a different brand. I've only had the Bandit Sangria, which I thought was pretty decent, but I'm no wine expert. I haven't taken it backpacking but I had it at a campground along a river where glass was banned.