This design looks good in theory: https://www.thingiverse.com/thing:4753565 https://www.thingiverse.com/thing:4753565 It's a 3D printed urinal with a captive l

This design looks good in theory: https://www.thingiverse.com/thing:4753565 https://www.thingiverse.com/thing:4753565 It's a 3D printed urinal with a captive lid that attaches to a standard plastic bottle.