iPrimio Stainless Steel Litter Pan (Extra Large) Review

Why it is our top pick

We tested five stainless steel litter boxes. The iPrimio stood out right away when we picked it up. The steel is noticeably heavier and stiffer than the competition. When we pressed on the floor of the box with both hands, it did not flex at all. That is the 18-gauge steel doing its job.

The corners are fully welded and smooth to the touch. There are no visible seam lines, no gaps, and no sharp edges. In our 30-day odor test, we cleaned it after each use and then let it sit for a week without cleaning. Even after that week, a close sniff of the empty box revealed nothing. The plastic box we ran as a control had a noticeable urine smell by day 10.

The size is also a real advantage. At 24 x 15.5 inches, this is bigger than most stainless steel options. Any cat under 20 lbs can turn around fully and dig without hanging over the edge. If you have a Maine Coon or a big domestic shorthair, this is the box that actually fits them.

Who it is right for

The iPrimio works for almost any cat. But it is the best choice for these situations:

• +Cats over 12 lbs who need a wide footprint
• +Multi-cat homes where the box gets heavy use
• +Cat owners who want something that lasts 10+ years
• +Anyone who has tried and failed to remove plastic litter box odor

What we like and what we do not

Bottom line

The iPrimio is the best stainless steel litter box we tested. If your cat is average size or larger and you want a box that never develops a smell, this is the one to buy. The $45 price looks high next to a $12 plastic box, but when the plastic box smells at month 6 and you are replacing it every year, the iPrimio costs less over any 3-year stretch.