A sort of beverage. Comes in brown bottles.

"A One that isn't Cold is scarcely a One at all."

See StrongBadEmail/property of ones.

Strong Bad can use the diamond-shaped thing on his head to open them, though he has used this power only once. See StrongBadEmail/super powers.

They use the phrase "Cold One" to be purposely ambiguous. So we as viewers don't really know if it is beer or not. We are left guessing. Can everyone agree on this? (And you can all still go home thinking you are right, okay?) -- Tom

Maybe it's a soda of some sort. Like coca-cola. It's brown... -- Osiris-Kitty