.The land of the free
FedEx refuses shipment of made-up stuff, empty cans
"FedEx guy: Is this really what this is? Rocket fuel?
Me [laughing, used to this reaction from being at the space-travel supply store]: Oh, no, no, no. Of course not. It's... made-up. Kind of a joke. It's actually full of sugar, which I just put in to give it some weight, but that's all it is.
FedEx guy: You can't ship this."