> Just use a water bottle like the rest of us!
That's not just using a water bottle. And certainly is specialized enough of a tool that you likely can't find it as ubiquitously as a water bottle.
I said that just peeing in a bottle really only works for half the population. That's all. Your choice to somehow read into those words so deeply as to make up a completely new sentence that was never written is yours alone.
I imagine if you place the bottle at the urethra opening it's possible it might work.
https://www.wikihow.com/Pee-in-a-Bottle-(Women)
https://www.rei.com/blog/hike/girl-talk-peeing-in-the-backco...
https://www.wikihow.com/Pee-in-a-Bottle
https://www.tripsavvy.com/can-women-pee-in-a-bottle-backpack...
https://www.ozmo.io/how-can-a-girl-pee-in-a-water-bottle/
(and many, many more)
It certainly doesn't seem anywhere near as easy as just [using] a water bottle.