I was thinking Coca Cola, but coffee is pretty weird too :)

I don't really have much to back up "most popular beverage", but I recall reading somewhere that the phrase "coca cola" is the most universally recognized fragment of speech in the world. Technically I suppose water would be more "popular", but different languages tend to have their own words for that.

What kind of coffee are you drinking that comes in aluminum canisters? Genuinely interested.

Very common in Japan, where you can buy all manor of drinks from vending machines on the side of the road, everywhere you go.

I've seen not only drinks but food as well. Even soup and gold can be bought through vending machines.

And underwear.

used underwear

I'd like to know what kinda coffee is carbonated, myself.

Then again, I've heard of some interesting soda flavors. There may be more of those than of ice cream.

In the US and Canada at least, a popular coffee company named Starbucks sells canned coffee-based beverages (although not in their own shops, I think).

UCC Coffee? http://www.amazon.com/UCC-Original-Coffee-Milk-11-3-Ounce/dp...

Quite common here in Germany/Austria: e.g. Nestlé ice coffee/espresso... either in aluminum cans or plastic bottles.