You!! Put the protractor down and step away from the Pepsi case!

Pepsi's latest promotion involves free music downloads from iTunes.com under winning bottle caps. It turns out that holding the bottles up and tilting to an angle of about 25° will allow you to peek just enough to determine if it's a winner or not. Here's the poop for all you would-be cheat... er... I mean winners.

(via scrubbles.net)