Gizmodo shared some useful advice today on how to create a Coke bottle cheat sheet using common household items: Coke bottle (what else), glue stick, scissors, and a computer with a printer and scanner.
We don't of course advocate cheating but do appreciate interesting mashups. Instead of spending so much time coming up with a cheat sheet for your Coke bottle, perhaps this could be an interesting way to pass silly love notes among friends. Definitely a way to spread some happiness.
[Disclosure: Coca-Cola is a BFG client.]