I pretty much gave up on coffee after leaving Siemens in Munich (where I had a coffee grinder on my desk!) and went cold turkey for a while.

Then living in Scotland I got back into Irn-Bru in a big way, so I get some caffeine from that!

Now, I have discovered 'Relentless' - a 500ml can of caffeine delight. 135 mg of caffeine per can! Wheeeeeeeeeeeeeeeeeeeeee! (tastes a wee bit better than red bull, and really goes well with vodka)