Okay....I looked it up to try and find all there were to see for a gag gift and discovered they have been around for years!!!!!! Actually used in subzero settings to "direct dampness away" when garbed in heavy clothing! For real!
Some historical information....
"In ancient China, both men and women stood up to urinate. Chinese noblemen would urinate into hollow canes so the urine would flow far way from their bodies."
They were even made in METAL! Ooooohhhhh, brrrrrrrrr, coldddddddd!