Bought ours this weekendNow you just need this.
http://www.basspro.c.../product/45412/
Go to lowes, get a $3- 5 gallon bucket, some small kitchen garbage bags, and some clumping kitty litter, and you are all set !!! Just put a little litter in bag, tie it up at end of day, toss in garbage. Oh yeah, a box of soft wipes too instead of t.p., cause if you drop the roll on the wet floor, it gets really mushy .... Ask me how I know !!! LOL !!!