I have a 5 gallon bucket lined with 2 garbage bags with some kitty litter inside. The lid is a toilet lid from emergencyessentials. It works well because the kitty litter cuts down on the smell and negates the liquid factor. I would guess that you could make a bag of kitty litter and a bunch of bags last well over a week. No water wastage! P.s. store the bucket in the garage and there is almost no smell in the cold. Throw (well, carefully place) the bags out with your trash...voila! Toilets can be reserved for their original intended use: the dog's water dish.