Another material that works well for bucket toilets is stove pellets. Dual-purpose for many, neat packaging and easily stored, doesn't become outdated if kept dry. A scoop added to the base of a woodstove fire seems to boost the heat factor, esp nice when you've got a cold room and a cold stove.

For those with a higher 'ick-factor' and some water for flushing, put solids in the porcelain toilet and urine in the bucket with the pellets. Since the pellets are just dampened, extruded sawdust, there is no toxicity problem, and it does a very good job on urine odor. It's also compostable.

It's also not bad as an emergency cat litter, but some cats that are used to the clay litters may object.

Sue