I use it on the truck when I can't wait for the rest area or next truck stop. I also use it at night for those times when the urge hits.
What the don't like is that it doesn't hold as much as it states. Threr uses and that's kind of pishing it. It leaks, or spills after the second use so I have to store it in s zip lock bag.
If there is a way that a "trap flap" could be added that would be great.