Yes same thing but shorter. It's actually 3 1/2 gal. I did a web search about $6. We just happened to already have a couple for car washing ect. I just used one of those. The lid snaps on the same.
As for the Cat litter we just take a bag of what Mama Squatch keeps in stock for her cats. Special Kitty unscented from Walmart. Cheap and absorbs well and no perfume to mess with allergies.
I don't care what is used in it for litter the bucket will smell when opened after a couple days use. But so do Porta Pots in my experience. Easier to throw a thrash bag in a dumpster than dump the liquid pot to me.
Right on! Thanks for the info! I think I'll get one of those 3.5 gal buckets and test this out.