OK.. probably TMI forthcoming.. lol
When I was in my RV I decided to 'test' the waters before van traveling. I purchased a dollar store OIL changing Funnel, the one with the long tube, and an angled top. I stood, funneled into empty large cat litter jug. Things went pretty good. I don't know what happened... after a week, maybe I guess my anatomy changed. WTH? I ended up peeing on my own stupid leg. THAT SUCKED, so I gave up on that. It just seemed to be a 50/50 thing. NOT good enough.
Next, I ultimately knew I could use a portapotty but wanted something less invasive in a minivan. I got the little WalMart brand totable 'toilet' with THREE LEGS (I still cannot get One of them to fold down?!) but I use the expensive liner that came with it, as a base; use two more regular kitchen bags (WHEN is someone going to make one the RIGHT SIZE for these operations?!) and some cat litter.
THE BEST THING about that little WalMart version: the Lid is so tight, there is not any smell (at least my way) If an emergency of 'mixing' the two and the cat litter.. it worked.
SO..
That's all I know. OH.. BTW.. I, too, ordered some fancy pink plastic foldable small pee standing up lady thing. HA.. it sucked. Or? Flopped. That was what sent me to the dollar store version!