Pocket Pisser STP
We sell this product pre made and ready to go, or you can also download the instructions for free and make it at home yourself.
1. Either fold the plastic sheet in half, so that it looks like a taco or roll it so it's more like a tube. Whichever works for you.
2. Stand with your legs around shoulder width apart.
3. Press the narrow end firmly against your body, behind all of your junk. You can do this through the fly, or by pulling your underwear down slightly to allow the device to be over the top of your underwear waistband.
4. Tilt the open end slightly down. Make sure the end clears your pants.
5. Relax and let flow.
It works at a urinal.
Fits in your pocket.
Works with a packer in place.