Stainless vs Plastic Litter Box (2026)
Stainless steel vs plastic litter boxes: odour retention, scratching, lifespan, cost and why plastic boxes start to smell.
The short version
Plastic scratches, and those scratches hold urine and bacteria, which is why an older plastic box smells even after cleaning. Stainless steel does not absorb, does not scratch as readily and lasts indefinitely, at several times the price. Replace plastic boxes periodically; buy stainless once if the smell is the problem.
At a glance
| Stainless Steel Low Entry Litter Box | IRIS Large High Sided Plastic Box | |
|---|---|---|
| Absorbs odour | No | Yes, once scratched |
| Scratch resistance | High | Low |
| Lifespan | Indefinite | Replace periodically |
| Weight | Heavier | Light |
| Cost | Higher | Low |
| Cold to the touch | Slightly | No |
Choose the Stainless Steel Low Entry Litter Box if…
Your box smells however often you clean it. That is the plastic holding odour in scratches, and no cleaning product fixes it. Stainless is a one-off purchase that removes the problem.
Check Stainless Steel Low Entry Litter Box on Amazon
Choose the IRIS Large High Sided Plastic Box if…
You want the cheapest workable option and are willing to replace it every year or two. Plastic is fine when new, and treating it as a consumable rather than permanent is the realistic approach.
Check IRIS Large High Sided Plastic Box on Amazon
Related
Comparison based on published manufacturer specifications and the general consensus of owner reports. We have not tested these products side by side. Confirm current specifications and prices before buying. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
We review it on its own too, in full detail: the KittyGoHere plastic pan.
Frequently Asked Questions
How often should a plastic box be replaced?
Commonly every year or two, sooner once you can see or feel scratches. Cost per year is not very different from stainless once you account for that.
Does box material affect use?
Some cats dislike the sound or feel of stainless initially. Introducing it alongside the old box rather than swapping suddenly avoids rejection.
How often should I scoop?
Daily at minimum, and twice daily is better, particularly for older cats. Cats are fastidious and a dirty box is a common cause of going elsewhere.
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