I recently went on a kayak/rafting trip on the Colorado River through the Grand Canyon. The National Park has a great leave no trace policy and all waste was carried out. The toilet we used was an ammo can with a toilet seat on it - called a groover because of the marks left before somebody suggested a toilet seat would be more comfy.
The groover was for solid waste and TP only. There was a separate bucket, also with a toilet seat, for pee so there was a fair amount of shimmying between the two if you forgot to pee in the river first.
My question is simple: can the PETT and similar toilets handle liquid waste and if not, how do you shimmy?
Cheers,
Graham