The IRIS USA Open-Top Jumbo Pan is the ruthlessly practical pick when you don't need any features beyond a roomy, easy-to-clean rectangle that any cat will use. At under $20 it's the cheapest box in this round-up by far, and the 8.4-inch wall height contains digging better than basic flat pans — but with no hood, no flap, and no top entry, you get zero spray or odor containment.
Full review
Real-World Performance
The IRIS USA Open-Top Cat Litter Pan Jumbo (model CLP-9J) is the no-frills baseline that every other product in this round-up gets measured against. It's a single-piece molded polypropylene tray, 20.75 inches long and 18 inches wide, with 8.4-inch tall walls that are higher than most basic pans but not so high that kittens or arthritic seniors can't step over them. There's no hood, no flap, no top entry, no rake, no rotating drum, and no app — just a rectangular pan that any cat will use without acclimation. IRIS lists it at 4.5+ stars on its own site, Petco shows 4.4 stars on the comparable scatter-shield version, and Chewy reviewers consistently rank it 'amazing for the price.'
Practical day-to-day: scooping is fast because the open top means you can stand over the pan and reach any corner. Refilling is a one-handed operation. Cleanup is a hose-rinse or a dishwasher run. The curved interior bottom is designed to give the scoop a smooth arc, which actually does make daily scooping noticeably faster than flat-bottomed pans. Tractor Supply, Petco, Chewy, and the IRIS USA direct site all stock the pan in multiple color options (navy, almond, gray, black), and the Petco and Chewy listings cluster around 4.4 stars from thousands of reviewers — putting it well into the same satisfaction tier as $50-plus hooded boxes for a fraction of the price.
Build Quality and Design
The single-piece molded construction is the design's biggest strength and biggest weakness. Strength: there are no seams to leak urine onto the floor, which is a documented failure mode of two-piece designs (including some IRIS scatter-shield variants where the shield is a separate snap-on piece). Weakness: the 1.5-pound empty weight means the pan can shift if a large cat steps in aggressively, especially on slick floors. A non-slip mat underneath solves that problem for about $10. The polypropylene is dishwasher-safe and the surface is smooth enough that urine doesn't bond to it, so a quarterly deep clean restores it close to new condition. Plan to replace the pan every 4 to 6 years as scratches accumulate and start trapping odor.
What Reviewers Loved
The two universal wins are price and acceptance. At under $20, this is the cheapest credible box on the market — multi-cat households often buy two or three pans for the price of one mid-tier hooded box. Acceptance is the other big one: there's almost no cat profile that won't use an open pan. Reviewers with kittens, with elderly cats, with cats recovering from surgery, with cats that have refused hooded or top-entry boxes, all report immediate use. The 8.4-inch wall height is also called out repeatedly — it's high enough to catch most digging spray and most scattered litter from enthusiastic coverers, while still being low enough for any cat to step over.
Where It Falls Short
Open-top design means open-top problems. There's no containment of odor — a freshly used pan will broadcast smell across the room until covered or scooped. There's no containment of high-spray urinators (some cats, especially unaltered males, aim upward and out, which the 8.4-inch wall is not tall enough to catch). And there's nothing stopping a curious dog or toddler from accessing the contents. Reviewers with multiple cats also note that the open pan is the box least likely to feel 'private,' which can matter for shy or anxious cats — particularly in busy households or with new additions.
Beyond design limitations, the construction itself is barebones: no flap, no hood, no buckles, no smart sensors. The lightweight plastic can flex if a 20-pound cat steps in hard. And the box stays visually present in the room because it's open — there's no aesthetic improvement the way a hooded or top-entry design provides. For a basement, garage, laundry room, or utility space, none of this matters. For a living room or kitchen-adjacent placement, it probably does.
Who It's Best For
Pick the IRIS USA Open-Top Jumbo Pan if you want the cheapest, most universally accepted litter pan available — especially for kittens, seniors, post-surgery cats, or any cat that's previously rejected a hooded or top-entry design. It's also the right choice for setting up a second or third box in a multi-cat home (the 'one box per cat plus one' rule), where the goal is just accessible litter coverage rather than premium containment. Skip it if odor in the room is a problem, if you have high-spraying cats, if you're in a small space and need visual aesthetics, or if you want any of the convenience that the more expensive units in this round-up provide.
How It Compares to Alternatives
Against the smart units — Litter-Robot 4, Petkit PuraMax 2, PetSafe ScoopFree Crystal Smart — this is a fundamentally different category, trading all automation and smart monitoring for the lowest possible cost. Against its IRIS USA Jumbo Hooded sibling, the open-top wins on cat acceptance, scoop accessibility, and price, but loses on odor and spray containment. Against the Modkat top-entry box at $109, this gives up the natural litter-tracking control of a top-entry design but costs less than a fifth as much. For households where the litter box lives in an out-of-sight utility space, the open-top is hard to argue with on value.
Value at This Price
At under $20 retail and frequently on sale in the $15 range, the IRIS Open-Top Jumbo is the unambiguous floor of the litter-box market. There are no ongoing consumables, no filters, no subscriptions, no proprietary trays. Replacement happens roughly every 4 to 6 years as the plastic ages, which works out to roughly $3 to $4 per year of amortized cost. Buying three of these for a multi-cat home runs $50, which is still less than a single Modkat liner replacement cycle. For buyers whose primary criterion is 'cheap, accepted by the cat, easy to clean,' there's nothing in the market that does the job for less.
Ongoing cost is just the litter itself — and because the open pan accommodates any litter type, you can choose the cheapest viable option. Bulk 40-pound bags of basic clumping clay run roughly $15 to $20 and last one cat 4 to 6 weeks, so annual litter cost lands in the $130 to $200 range. That's lower than the PetSafe ScoopFree's $240 annual tray spend before you even count the box itself. Multi-cat households often pair this pan with a smart unit (one or two open-tops for backup or for cats that reject the smart unit, plus one Litter-Robot 4 or PuraMax 2 as the primary) — at $17 each, that hybrid strategy is genuinely affordable.
Long-Term Durability
Single-piece polypropylene molding is about as durable as litter-box construction gets — there are no seams, no joints, no moving parts to fail. The published failure modes from years of Chewy and Petco reviews are limited to surface scratching that eventually traps odor (years 4 to 6) and rare cracking if the pan is dropped from height onto a hard floor. Cleaning is forgiving: the pan tolerates dish soap, vinegar, diluted bleach, and even a run through the dishwasher on the bottom rack. The lightweight construction is a double-edged sword for longevity — the pan flexes rather than cracks under stress, which is good, but the same flex means a heavy cat landing hard can pop the pan off a slick floor unless secured by a non-slip mat. For under $20, the durability-to-price ratio is unmatched in the category.
Strengths
- +Under $20 — the cheapest unit in this round-up by a wide margin
- +8.4-inch tall walls contain digging and spray better than standard pans
- +20.75 x 18 inch floor accommodates large cats and multi-cat use
- +Open design accepted by virtually every cat, including kittens and seniors
- +BPA-free recyclable polypropylene, dishwasher-safe and easy to scrub
Watch-outs
- −Open top offers no odor or spray containment for high-aimers
- −Single-piece molded plastic has no separate hood for privacy
- −Lightweight 1.5-pound construction can shift when a large cat enters
How it compares
By far the cheapest in this round-up — about 1/40th the cost of the Litter-Robot 4 and roughly a third the price of the IRIS USA Jumbo Hooded sibling. Loses every containment and smart feature in exchange, so this is the right pick when you specifically want an open, low-barrier design that any cat will accept. The Modkat top-entry box at $109 trades the open access for litter-tracking control; the Petkit PuraMax 2 and PetSafe ScoopFree Crystal Smart trade it for automation.
Who this is for
At a glance: Budget-minded households of any size, owners with kittens or senior cats that struggle with hooded or top-entry designs, and anyone setting up a second or third box where containment is not the priority.
Why you’d buy the IRIS USA Open-Top Cat Litter Pan Jumbo
- Under $20 — the cheapest unit in this round-up by a wide margin.
- 8.4-inch tall walls contain digging and spray better than standard pans.
- 20.75 x 18 inch floor accommodates large cats and multi-cat use.
Why you’d skip it
- Open top offers no odor or spray containment for high-aimers.
- Single-piece molded plastic has no separate hood for privacy.
- Lightweight 1.5-pound construction can shift when a large cat enters.
Rating sources
“High sides keep litter and spray contained, and curved sides with an included scoop make cleaning simple”
“Curved sides and the included scoop make cleaning simple”
“Spacious, well-priced, and easy to scrub — what every basic litter box should be”
Our 4.4 score is the average of these published ratings. More about methodology.
