So I went out for a milkshake with a couple friends, and the guy brings our milkshakes and then the "extras" in the metal canisters. When one of my friends saw my confused look, he said, "It's the rest of your milkshake, the amount that won't fit in the glass. They bring it like this. Don't ever go out for one and let them get away with not giving you the rest of it." And he said it like, "Duh, don't you know that?"
Uh, HOW was I supposed to know that??? How do I know the size of the canisters that a particular restaurant uses? And what if all that was made was served to me? Then I'd look like a jerk if I said "And where's the REST of my milkshake?"
Uh, here's an idea: why don't the restaurants get BIGGER glasses???