This is an absolutely indispensable product to have if you travel with your kitty. When my cat was a few months old I had the smaller version of this to bring along on airplanes. I would throw the SturdiBox and a ziplock bag of litter into my then-kitten's "go bag" and on layovers I would just pour litter into the box and take her inside a bathroom stall so the smell wouldn't offend. The SturdiBox is obviously smaller than a regular litter box but she could still get all four legs in and figure it out. Now I have this larger version and it works fine for my 9 lb cat. I wouldn't try it on a cat much larger than 9 or 10 lbs though.The material is slick so it's incredibly easy to pour out litter without bits getting stuck everywhere. When unfolded the material is stiff enough to stay put in a box shape but it is also quite easy to collapse and button in place (no struggling to remember complicated folding instructions). It is also definitely water tight. Phew! Finally, it's easy to clean. Seriously, you won't find a collapsible litterbox option that's easier than this. You could use those disposable ones but they're a) unwieldy to pack and b) environmentally unfriendly.