The Litter Robot 2 Bubble Unit is a next generation device which improves upon its predecessor, offering larger sized cats (we’re talking about domestic breeds here and not panthers or tigers) more room to relieve themselves. With the addition of a new ‘Skylight/Bubble’ type window, your little feline friend will be able to enjoy 3″ more room as well as natural light in its enclosed chamber to make sure it doesn’t step on its own excrement when done. Too bad the colors were not updated, coming in beige, gray and black.