We don't have that much, but we pour it into a coffee can and let it dry up. We mix some boggers in with it to help soak it up. We don't wait until the bottle is full. Then we throw the can into the river......
Only kidding....
Yeaaaa...at least I don't have to call a plumber to clean out the droppings left by certain employees. I think maybe a nice tie dye collection would be a good use. Why throw it away when we can squeeze some more use from it.It adds a little color to my shops crapper.