The square pails used for cat litter can work well. I think they are 4 gallon. Good for conserving space. Also I found you can do a search for square pail on the net and find manufacturers that have them in black and will ship to you. Or running an ad on craigslist under the wanted section will find the litter boxes. Every town has one of those wierd cat ladies.Hope I helped.
Good growing:thumbsup: