As a longtime international traveler, I tried one of those. I never tried to use one again.
I have learned the hard way that in some cultures, people pee in public, and that includes women. In Mongolia, Africa and other places I have simply learned to drop trou and piss in public. While yes, that will draw stares because of the simple fact that I’m the only white woman for miles, and it’s likely going to be told and retold at the night time sports reels, I have to pee. Period. You get over it already. Relieving ourselves is part of life. And kindly, in the places I go, by horse or camel or whatever, I often end up in the middle of flatlands for miles in all directions. No bushes, trees, or even slightly large pebbles.
You learn to piss. Or be miserable.
I still have the very first She-Wee someone gave me back in 1984. I tried to use it by the side of the road in New Zealand. I laughed so hard I fell in the ditch.
The product works for some. Many, in fact. If I recall correctly it was originally designed for female sailors. I tried it on a boat once. Gave up and jumped in the water instead.
Truth be told, finding a place to pee or whatever has given me some of my funniest travel stories.