06/2021 UPDATE: I have concluded that the pee funnel is indeed too small. Really, every one of the three different funnel-type devices I've now tried are all a bust. *TMI ALERT* Maybe my "pee pattern" is just too wide. Since I'm the one using this, whatever system I use needs to accomodate MY needs. So, I am giving up on separation of liquids and solids. If I was living in the van full-time, I'd probably buy an existing system (which take up a LOT of space), but I'm just a part-time adventurer. So, putting everything in one pot, covered with pine pellets or other absorbant compostable material and then dumping that full bag in the trash every other day or so will work just fine.