Last updated Sep 28, 2025
Liz Coleman / Cats.com
Are you tired of finding cat litter strewn across your floors? What about the unpleasant smell of ammonia wafting through your living room? If so, a top-entry litter box is worth considering. The IRIS USA Top-Entry Litter Box is a thoughtfully designed option with an unobtrusive appearance. But will it work for your household?
Ratings
- Ease of Cleaning – 5/5
- Odor Control – 4/5
- Appearance – 5/5
- Construction – 3/5
- Price – 4/5
Overall Score: 4.2/5
To help you decide, I tested this litter box in my home for several weeks. This article will review how well the IRIS performed in the areas that matter most: its ease of use for cats; its ability to control odors and scatter; and how practical it is to open, seal, and clean.
Why Trust Cats.com
Our team has personally tested more than 20 litter boxes—so we know a thing or two about what makes a good one. To determine where the IRIS Top-Entry Litter Box stands among the rest, I enlisted the help of two tester cats. With their reactions as a guide, I examined its design and ease of use. I also observed its effectiveness in containing litter and odors, which is the litter box’s primary purpose.
Although our tester cats ultimately refused to use this litter box (enclosed boxes are not every cat’s cup of tea), we simulated a cat deposit with water to see whether clumps were easy to scoop or if they stuck to the sides. We also wanted to find out if the curved sides would be problematic when cleaning. Finally, we evaluated the lid, noting how much weight it could hold and how easy (or challenging) it was to remove and secure.
IRIS USA Top-Entry Litter Box Review Video
Mallory Crusta, our Head of Content, tested the IRIS Top-Entry Litter Box in May of 2020, and I tested it myself this year. Check out Mallory’s in-depth video review of the IRIS Top-Entry Litter Box on the Cats.com YouTube channel.
IRIS Top-Entry Cat Litter Box and IRIS USA Overview
IRIS Ohyama Inc. was established 1971 in Japan. In 1992, the company expanded its operation stateside by launching IRIS USA. It offers a wide range of pet products, such as litter boxes, food storage, and carriers. They also carry home goods, storage, organizational bins, and small home appliances like air purifiers, fans, heaters, and handheld vacuums.
The company has made some efforts toward sustainability by using polypropylene, a #5 plastic resin that is recyclable in many U.S. locations. They are also GreenCircle certified. IRIS Top-Entry Litter Box is currently manufactured in the United States. This ovular litter box is designed to control scatter and comes with a cat litter scoop for easy cleaning.
IRIS USA Top-Entry Litter Box Features
The lid of the IRIS Top-Entry Litter Box snaps into place with two plastic tabs. Liz Coleman / Cats.com
The main advantage of a top-entry litter box is that it reduces the amount of litter that ends up on your floors. They can contain spraying and bad smells, too. They’re also useful for keeping dogs and small children out of the litter.
The IRIS litter box is enclosed on all sides and has a removable lid with a cat-sized entrance (10.5 by 9 inches). This entry hole sits off-center to give cats an ample platform for jumping into the litter box. The lid is easily removed for cleaning by pressing two buttons on either side of the box. The lid also acts like a built-in mat, designed with a row of ridges that remove litter particles from your cat’s paws as they exit the box.
This litter box is approximately 16 inches wide and 20.5 inches long. It stands 14.5 inches tall, which means your cat will need to be able to jump to use it. The lid is strong, but has its limits and can hold a weight of 20 pounds or less.
Conveniently, a scoop is included (though it’s on the small side). A plastic latch attaches it to the side of the litter box, so you always have it close to hand.
Available in several neutral color combinations, the IRIS litter box is a discreet box that blends nicely into the background. The brand’s website states it comes with non-skid rubber feet, but it appears to have undergone some manufacturing changes. There are no rubber feet, and a few reviews point out the newer models are made with lower-quality plastic.
What We Like:
- Keeps litter out of sight and helps minimize litter mess
- Includes a scoop that can hang from the side of the box
- Removable grooved lid prevents tracking
- Suitable for all litter types
- Available in several neutral color schemes (white/beige, white/black, white/gray, and black/gray)
What We Dislike:
- Entry hole will be too small for bigger cats
- The lid is slightly difficult to remove
- No handles for carrying
What Did Our Test Cats Think?
Tester cat, Floyd, found the entrance too small for comfort. Liz Coleman / Cats.com
My immediate impression of the IRIS Top-Entry Litter Box was that it looked attractive and modern. In fact, it looks more like a storage tub than a litter box. Its rounded shape and color scheme lend the IRIS a sophisticated aesthetic that doesn’t scream “cat toilet.” It also helps that you’re not looking directly at your cat’s little “treasures” every time you glance at it. The box isn’t excessively large, making it suitable for smaller living spaces.
At 11 years old, our tester cat, Floyd, is still spry enough to clear the 14-inch jump to the lid. We were both pleased (relieved, really) that the lid was sturdy enough to handle his weight. The entrance, however, was another story. The entry hole is much too small for Floyd to even consider squeezing his massive self down there. For a small to mid-sized cat, it could work. But larger cats will find the IRIS Top-Entry a tight squeeze.
The lid is secured to the base with two notches. I had some trouble pressing them in the first few times I removed the lid. But once you get the hang of it, it’s pretty easy. Grooves along the lid catch scatter, but they’ll only be effective if your cat jumps from the box to the lid before landing on the ground. Some cats will skip this step and jump directly out of the litter box after doing their business.
You can scoop clumps directly out of the opening—no lid removal required. Liz Coleman / Cats.com
I appreciated that the opening was large enough to comfortably scoop waste without having to remove the lid. And as someone who likes an organized home where everything has its own “place,” I really liked that you can hang the scoop from the side of the box. The scoop itself is small, but it gets the job done. Also, the walls are slick, so litter didn’t stick to them.
If I had a complaint, it would be that there are no handles. This made it trickier to transport the litter box when it came time to dump its contents. Against my better judgment, I gripped the entry hole to carry it to the trash. But the plastic notches on the lid were no match for the weight of the box with litter in it, and (no surprise) they released and the box fell to the ground. Thankfully, it fell upright, and I avoided a catastrophic litter nightmare.
Bottom line: I think the IRIS Top-Entry Litter Box is a well-designed product that will work for the right household. It might not be successful with overweight cats, older cats, nervous cats, less mobile seniors, or super small kittens. But it could be a good solution for small- to medium-sized cats that are agile and not averse to enclosed spaces.
What Do Customers Think of the IRIS USA Top Entry Litter Box?
Positive Reviews
“This is the first top entry litter box my kitten has tried but it is excellent. The first few times he was a bit messier and got a bit of litter on the floor but after that it has been almost spotless. This is excellent at reducing litter tracking. For reference my kitten is between 4-5 months old and he was able to jump in and out with no problems. Previously had only been using traditional litter boxes.” – by Delaney, on Chewy, September 10, 2025
“I got this litter box because it was suggested by someone else and it does not disappoint! My little fella digs in his litter like he is trying to dig a hole to China and would throw cat litter everywhere, no longer and issue at all, it’s bigger and he has some privacy too! 10/10 recommend” – by Nadia,on Chewy, September 7, 2025
Reviews of the IRIS Top-Entry Litter Box are largely favorable. On Amazon, it has garnered an average of 4.4 stars from over 68,000 global reviews. On Chewy, 78% of customers would recommend it to a friend. Most cat owners were pleased with how well this box contained litter scatter. A good number also reported a noticeable reduction in litter odors. Finally, customers liked the attractive design of the IRIS litter box.
Negative Reviews
“The plastic walls are easily knocked off and take a lot of patience to put on .. only to be knocked off by my cat the next time he uses the bathroom. Less litter comes out than boxes without walls, but I still get a huge pile at the front of the box. Despite the high walls, my cat still soils over the back side. He is about 13 pounds, so definitely on the larger side, but not as large as a Maine Coon. I don’t recommend it, better using your money for another box.” – by swag master 2002, on Amazon,September 24, 2025
“This litter box is just awful !!!! First, it has a ridge around the bottom about 2 inches from the inside of the box. Second, if you don’t get off all the litter that is around the ridge, it makes a mess. Please ask this company who manufactures this box, to make a better box without the ridge on the bottom. I have had many Litter Boxes over the years and this is the only one I ever had any issues with. Please DO NOT buy this box as you will be sorry and it is a waste of time having to clean around the ridge at every time you are picking up the urine . I use clumping litter and it makes no difference. There are many other Litter Boxes on the market, get one of those instead of this one. Giving a rating of 1(one) because the blue is a nice color.” – by Kindle Customer, on Amazon, September 14, 2025
The most concerning area of complaint is the two lid tabs. A lot of reviews mention they don’t fit properly or hold the lid securely in place. Some faulty lids even resulted in cats falling into the litter box (yikes!) Some folks also reported that the plastic was flimsy, causing the lid to cave under their cat’s weight. Finally, as we noted, some people were unhappy with how small the included litter scoop was.
Similar Brands
Looking for other litter box brands similar to IRIS USA? Check out some of our other brand reviews.
Frequently Asked Questions
Do cats do well with top-entry litter boxes?
Every cat is different and will have their own preferences when it comes to how they do their business. Many cats prefer an open litter box to keep an eye out for incoming threats. However, some cats will take to a top-entry litter box. They’re best suited for young, agile cats that can jump with ease. They might not work for older or overweight cats.
How do you introduce a cat to a top-entry litter box?
Your cat might need time to acclimate to a top-entry litter box. Place the new litter box in the same spot as the old box. Fill it with your usual litter, adding a few scoops from their original litter box. You can also gently place your cat on the lid to familiarize them with it.
Do top-entry litter boxes keep dogs out?
They might not keep out the most determined dogs, but a top-entry box can help discourage pups from snacking on litter.
Why won’t my cat use a top-entry litter box?
For one, getting into a top-entry box could be too difficult for them. Or it could be a personal preference. Cats can be picky; some just won’t adjust to a top-entry litter box.
