My GF from college, a Bar Harbor girl from Maine, wanted me to come back with her for winter break to her home town in Bar Harbor Maine. To make a long story short, the conversation of snow shoeing came up with her Mom and Dad and younger sister, because I guess that's one of the fun things to do when there's a foot of snow on the ground during the winter. I don't know when or how the outdoorsy, snow shoeing conversation took a strange turn, but it did when her Mom started talking about how a woman goes pee with all that clothing on, while wearing snow shoes and all the other gear. Just like a bolt of lightning the mom jumps up and runs into the other room and returns clutching something in her hand. "Ya, see.... You don't have to take your pants down or worry about falling in your own pee with this device...." She produces a funnel of some sort like what OP was describing. I thought it was a joke and looked over at the family (GF, younger sister and the dad), my GF's head in her hands, with both the younger sister and father red-faced, dying of laughter. Then the mom proceeds to show me how to use it. That was a really interesting dinner.