Irn Bru! A Scottish pop. Tastes a little like cream soda, but knocks cream soda on its pansy pink hiny. Pronounced like "iron brew", not "urn". It's awesome. It's in the Imported Foods section of many grocery stores around here, but it only comes in the expensive little bottles. I love to go to Scotland where I can buy a can or a big friggin' two-litre bottle or even order a tall glass of it in a restaurant. Man, Scotland is the best.
I also love British juices like
Ribena, which is occasionally available here in specialty stores, usually in concentrated syrup form.
Oasis is another juice, quite possibly the most delicious juice I have ever ingested. I've looked everywhere for it this side of the country and I've never found it. There's some kind of juice called Oasis here but it's not even close to the same thing.