The part the manufacturer sells you forever

Waste cassettes, drawers and liners

Every automatic box holds its waste somewhere, and manufacturers differ sharply on whether that somewhere is a €0.10 bin bag or a €5 sealed cassette. Over three years that gap is larger than the price difference between the machines themselves. We list what each system takes, what a change costs, how well it seals, and — the question that decides the whole budget — whether generic refills fit.

By Jean-Benoit Buisson

What we recommend

PetSafe ScoopFree disposable tray, 3-pack

Pre-filled disposable trays for the ScoopFree system: the crystals absorb urine and dry solids, and the whole tray is thrown away rather than emptied.

Contents
Three disposable trays, pre-filled with blue crystal litter
Handling
PetSafe: no seeing, touching or smelling the waste
System
ScoopFree automatic boxes
Amazon reference
DE B00CWR7HFK · US B00DQXR8N0 · GB B00CWR7HFK · FR B00CWR7HFK · IT B00CWR7HFK · ES B00CWR7HFK
EAN
0707005187070
- Nothing to scoop, wash or refill — the entire tray goes in the bin
- Crystals dry solids, which is what keeps the smell down between changes
- This is the expensive way to own a litter box, and it never stops
Best for: ScoopFree owners who bought the machine for exactly this — no contact with the waste at all.

≈ $40
Check price on Amazon
PetSafe ScoopFree tray refill, PAC19-14262

A pre-filled blue crystal disposable tray for the ScoopFree Original and Ultra, with a plastic leak lining.

Price
$25.99
Tray count
Not stated in the title — weight and size match one tray
Three-pack on this shelf
≈ $40, or $13.33 a tray
Litter
PetSafe premium blue crystals, pre-filled
Leak protection
Plastic tray lining
Dust claim
99% dust free — method not published
Compatibility
ScoopFree Original and Ultra
Shipping
1,225 g (43.2 oz), 559 × 368 × 51 mm (22 × 14.5 × 2.01 in)
Reference
PAC19-14262, EAN 0701002633554
Stated life
"Every few weeks" — no figure
Amazon reference
B00CWR7HIM
EAN
0701002633554
- Fits both ScoopFree generations, which few consumables on this shelf do
- A plastic lining against leaks, which matters on a tray carried full to the bin
- No tray count on the listing, and the shipping weight matches one tray
Best for: A ScoopFree owner who has checked the count and cannot get the three-pack

Check price on Amazon
PetSafe ScoopFree reusable tray

A durable, leak-proof tray with rounded edges that takes PetSafe crystal litter and is refilled by hand — the alternative to buying disposable trays for ever.

Type
Reusable tray, refilled by hand
Construction
Durable leak-proof plastic, rounded edges
Litter
PetSafe premium crystal litter
Amazon reference
B01J5GE3GQ (identical on 6 markets)
EAN
0729849157101
- Pays for itself against disposable trays within months, not years
- Rounded edges mean it actually empties, rather than trapping litter in corners
- You now handle the crystals yourself — the thing the disposable system exists to avoid
Best for: ScoopFree owners doing the arithmetic on year two.

≈ $42
Check price on Amazon
PetSafe ScoopFree crystal litter, 2-pack

Two 2 kg (4.4 lb) bags of PetSafe premium crystal litter, compatible with any ScoopFree automatic or crystal system and with conventional litter boxes.

Contents
Two 2 kg (4.4 lb) bags
Type
Crystal — absorbs urine, dries solids
Compatibility
Any ScoopFree automatic or crystal system, and conventional boxes
Amazon reference
B01J5GE3MA (identical on 6 markets)
EAN
0729849157118
- The consumable that makes the reusable tray worthwhile
- Crystals dry solids rather than clumping them — different smell profile from clay
- Crystal litter is not suitable for clumping machines — it jams rakes built for clay
Best for: A ScoopFree owner with the reusable tray, and anyone whose cat prefers crystals.

≈ $24
Check price on Amazon
Litter Genie LitterLocker XL refill, 3-pack

Refill cassettes of multi-layer odor-barrier film for the LitterLocker disposal bin — where the waste from any litter box goes between bin days.

Contents
Three XL refill cassettes
Film
Original odor-barrier film, 50% more per cassette than standard
Use
Sealed disposal of litter waste between collections
Amazon reference
B0CHX76HB1 (identical on 6 markets)
EAN
0666594209344
- Solves the problem an automatic box does not: where the waste sits until bin day
- XL cassettes hold 50% more film, so fewer changes
- Proprietary cassettes — the bin only takes these
Best for: Flats and small houses where the bin is indoors and collections are weekly.

≈ $80
Check price on Amazon
KMKMVV Litter Genie refills, 15-pack

Fifteen third-party refill bags with a cassette for the Litter Genie disposal pails, in seven-layer film, at $24.99.

Contents
15 refill bags and 1 refill cassette
Price
$24.99
Fits
Litter Genie Standard, Plus and XL pails
Film
7 layers
Stated life per bag
Up to 8 weeks, one cat
Genuine comparison
3 XL cassettes ≈ $80, or $26.67 each
Loading
Film is assembled into the cassette by hand
Film thickness
Not published
Cassette reusable afterwards
Not published
Amazon reference
B0F9KZSCBM
EAN
0769293643034
- The whole fifteen-pack costs less than one genuine XL cassette
- A cassette is included, so a pail with a broken cartridge becomes usable again
- The film is loaded by hand rather than dropped in sealed
Best for: A Litter Genie owner who has priced a year of genuine cassettes

Check price on Amazon
Pet Genie Pail, I000651

A sealed pail for dog waste with an odor-locking slide and a locking lid, taking square refill film stated to last two months for one dog.

Body
246 × 246 × 470 mm (9.69 × 9.69 × 18.5 in), 2 kg
Seals
Sliding odor lock, plus a handle that locks the lid
Refill shape
Square — no third-party equivalent found in this survey
Refill included
1, stated to last up to 2 months for one dog
Takes
Waste, bags, diapers, training pads, dog litter
Use
Indoors or outdoors, UV-protected plastic
Temperature limit
Not below −10 °C (14 °F) / 14 °F
EAN
0666594209436 — Litter Genie refills are 0666594209344
Refill price
Not published
Usable capacity
Not published
Amazon reference
B0CHTDZ1JC
EAN
0666594209436
- Two separate seals: an odor slide and a lid the dog cannot lift
- Takes waste directly, replacing a bag per walk with film per two weeks
- A square refill, with no third-party alternative in the American survey
Best for: One dog, where the walk ends at the pail rather than at the outside bin

Check price on Amazon

Finding your need in waste cassettes & liners

Containing odors

The multi-layer film in the cassettes is what holds odors back. It is the only property that separates these refills from an ordinary bag.

PetSafe ScoopFree crystal litter, 2-pack

Lasting more than two weeks

A cassette lasts three weeks for one cat and one week for three. The stated film length, divided by the number of animals, gives the real monthly cost.

Litter Genie LitterLocker XL refill, 3-pack

The buyer behind each kind, in waste cassettes & liners

Box in a living room: That is where the odor film fully earns its place. In a garage, an ordinary bag is often enough.
Several cats: Refill consumption becomes a real budget line. Some owners then switch to standard bags.
Absences: A drawer that fills up while you are away with no noticeable smell is the format's main argument.

The downsides that come with waste cassettes & liners

Original refills against standard bags: Original refills are designed for the mechanism and cost a lot to run; standard bags cost almost nothing and hold odors less well.
Thick film against capacity: A thicker film holds better and fills the cassette in fewer turns. The stated capacity depends directly on it.
Running cost against convenience: This is the real hidden cost of automatic boxes. It is worked out before buying the box, not afterwards.

The questions people ask about waste cassettes & liners

Can ordinary bags be used?

On many boxes, yes, at the price of weaker odor control. That is what a lot of owners do to cut the running cost.

How often should the cassette be changed?

Depending on the number of cats and the capacity, generally every few weeks. A full cassette jams the mechanism.

Are refills compatible across brands?

No, they are specific to the box model. A point to watch before buying the box itself.

Does the film really hold odors?

Multi-layer films are markedly more effective than a plain bag. The effect stays limited if the drawer is not emptied often enough.

How can the running cost be reduced?

By using standard bags where the box allows it. That recurring cost should be estimated before buying the box.

What do I do with an empty cassette?

It goes out with the household waste. Some makers offer refills that slot into the existing shell.

Is a filter needed as well?

Many boxes combine film and a carbon filter. The two complement each other and are replaced on different rhythms.

Is the film compostable?

Almost never: it is multilayer polyethylene, designed for odor tightness. Cat waste itself is not garden-compostable either, for health reasons.

Worth remembering, on waste cassettes & liners

Refill cost is the real hidden cost of an automatic box: work it out before buying the box, not afterwards. Many boxes take standard bags — less effective on odors but far cheaper to run.

Waste cassettes & liners in brief

Waste cassettes & liners, side by side

There is no table here, and the reason is in the listings. The figure published most often across these 7 products is contents, given by 4 of them — short of the four in five a column needs to compare rather than to display gaps. Each product page says what its own maker published.

Sources, and how we decide

Specifications: manufacturer sheets for pet devices and the matching Amazon product pages. Prices and availability: Keepa.

Most recent revision in this category: October 6, 2026.

The way we judge waste cassettes & liners

Prices quoted in these summaries are dated readings. The live price is shown next to each product.