Odor Control

The best trash can deodorizers

Three different mechanisms get sold as one product category. Carbon adsorbs, baking soda neutralizes, and fragrance masks — and only two of those are worth paying for.

By Ryder M. · Last reviewed September 27, 2026

Household air freshener and cleaning products

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The short answer

For a kitchen can, a carbon filter or pod in the lid, because that is where the odor collects. For an outdoor cart, a baking soda powder over each bag, because a pod in that volume of air does nothing. If you dislike fragrance, a plant-oil sachet is the fragrance-free option.

#	Product	Best for	Price
01	simplehuman Odorsorb PodA plant-oil pod that clips under the lid and works for around 45 days — the right place to put odor control.	Best in-lid pod	$14.98 · View on Amazon $25.00 · 40% off · Price as of November 14, 2026. #ad How we make money
02	iTouchless AbsorbX Natural Activated Carbon Odor Filter RefillsThe replacement carbon filter for iTouchless cans, and the one consumable that keeps a filtered can working.	Best carbon refill	$23.96 · View on Amazon $29.99 · 20% off · Price as of November 14, 2026. #ad How we make money
03	Arm & Hammer Trash Can & Dumpster Deodorizer, 42.6 oz (Case of 9)Baking soda in a sprinkle-top jar, sized for the outdoor can where a lid pod would be pointless.	Best for outdoor cans	$39.99 · View on Amazon Price as of November 14, 2026. #ad How we make money
04	Fresh Wave Odor Eliminating PacksA plant-oil sachet that lasts a couple of weeks to a month and does not add a fragrance of its own.	Best fragrance-free option	$14.49 · View on Amazon Price as of November 14, 2026. #ad How we make money

Three mechanisms, sold as one category

This is the distinction the packaging never makes, and it decides which product is right for your situation.

Mechanism	What it does	Best for	Limitation
Adsorption (activated carbon)	Odor molecules bind to the carbon's surface and stay there	Enclosed lid headspace — kitchen cans	Finite surface; saturates silently with no indicator
Neutralization (baking soda)	Chemically neutralizes acidic odor compounds	Large open volumes — outdoor carts	Works on acidic compounds, less on others
Binding (plant oils)	Plant-oil compounds bind odor molecules	Anywhere a fragrance would be unwelcome	Shorter duration; effect varies by odor type
Masking (fragrance)	Adds a stronger smell on top	Honestly — nothing	Many people find the combination worse

Most commercial products are a blend, which is why reading the mechanism rather than the marketing matters. Arm & Hammer's trash deodorizer, for instance, is baking soda plus an odor-fighting fragrance — the baking soda does real work and the fragrance is noticeable, and whether that is a feature depends entirely on you.

The picks in full

01 — Best in-lid pod

simplehuman Odorsorb Pod

A plant-oil pod that clips under the lid and works for around 45 days — the right place to put odor control.

Duration: ~45 days (manufacturer figure)
Formula: Plant-oil based
Fitment: Clips under the lid

Odor collects in the headspace under a closed lid, not at the bottom of the bag, which is why powders sprinkled into the can underperform. A pod clipped into the lid sits in that headspace. simplehuman states roughly 45 days per pod.

What we'd flag: 45 days means eight pods a year, indefinitely. That is a running cost, and it does nothing about a can that needs washing — a pod on a dirty can is perfume over a problem.

$14.98 · View on Amazon

$25.00 · 40% off · Price as of November 14, 2026. #ad How we make money

02 — Best carbon refill

iTouchless AbsorbX Natural Activated Carbon Odor Filter Refills

The replacement carbon filter for iTouchless cans, and the one consumable that keeps a filtered can working.

Type: Natural activated carbon
Fitment: iTouchless lid filter slot
Mechanism: Adsorption, not masking

Activated carbon works by adsorption — odor molecules bind to the carbon's surface — which is a genuinely different mechanism from a fragrance. It is also finite: once the surface is occupied, the filter is inert. These are the refills for the slot already built into every iTouchless lid.

What we'd flag: there is no indicator that tells you a carbon filter is spent. It looks identical on day one and day two hundred, so you are working to a calendar, not a signal.

$23.96 · View on Amazon

$29.99 · 20% off · Price as of November 14, 2026. #ad How we make money

03 — Best for outdoor cans

Arm & Hammer Trash Can & Dumpster Deodorizer, 42.6 oz (Case of 9)

Baking soda in a sprinkle-top jar, sized for the outdoor can where a lid pod would be pointless.

Size: 42.6 oz
Form: Powder, sprinkle top
Active: Baking soda plus fragrance
Use: Apply each time waste is added

Outdoor cans are too big and too open for a lid pod to do anything. A powder you sprinkle over each bag as it goes in works at the surface where the smell is generated, and baking soda neutralizes acidic odor compounds rather than covering them. Arm & Hammer recommends applying it every time you add garbage.

What we'd flag: it is a fragranced product, not pure baking soda, and the fragrance is noticeable. In a garage with a door into the house you may find you have traded one smell for another.

$39.99 · View on Amazon

Price as of November 14, 2026. #ad How we make money

04 — Best fragrance-free option

Fresh Wave Odor Eliminating Packs

A plant-oil sachet that lasts a couple of weeks to a month and does not add a fragrance of its own.

Duration: 15-30 days per pack (manufacturer figure)
Formula: Plant oil
Power: None required

For people who find scented products worse than the smell, this is the useful category: a plant-oil formula that binds odor compounds without laying perfume over them. It needs no power, so it works in a can, a diaper pail or a garage equally.

What we'd flag: 15 to 30 days is a wide range, and the short end is what you will get on a can with food waste in it. Budget for the shorter figure.

$14.49 · View on Amazon

Price as of November 14, 2026. #ad How we make money

Matching the product to the can

Your can	Use	Why
Kitchen can with a filter slot	Carbon refills for that slot	The slot puts the carbon exactly where the air is
Kitchen can with no slot	A pod clipped under the lid	Same headspace, no slot needed
Compost caddy	A filtered lid, replaced on schedule	The highest odor load per liter in the house
Outdoor cart	Baking soda powder over each bag	Too much air volume for a pod to matter
Garage can	Powder, plus ventilation	Heat and no airflow compound each other
Diaper pail	Plant-oil sachet or a carbon pod	Ammonia-heavy; fragrance masks it badly
An open can	Nothing	No headspace to treat. Get a lid

The outdoor row is the one people get wrong most often. A pod designed for a 50-liter kitchen headspace is meaningless in a 240-liter cart standing in the open, and a powder applied to the surface of each bag as it goes in works where the odor is actually being generated. Garage cans have their own page.

The free options, honestly assessed

We would rather you tried these first, because several of them work and all of them cost nothing.

Plain baking soda in the base of the can. Genuinely effective on acidic odors, costs almost nothing, no fragrance. This is the same active ingredient as the commercial powder without the perfume. Replace it monthly.
Freezing food scraps until collection day. Not a deodorizer at all, and the most effective thing in this list. Frozen waste does not decompose, so there is no odor to treat.
Newspaper in the base. Absorbs liquid before it dries into residue on the can. Old-fashioned, cheap, and it addresses the cause rather than the symptom.
A few drops of essential oil on a cotton pad under the lid. This is masking, so it has the same limitations as any fragrance — but it costs nothing and some people genuinely prefer it.
Leaving the can in sunlight after washing. UV is a real disinfectant and drying removes the damp bacteria need. Free, and it is part of the cleaning method.

If those do not do it, then buy something — and buy based on the mechanism table above rather than the claims on the front of the packet.

Common questions

Do trash can deodorizers work?

Activated carbon genuinely removes odor molecules by adsorption until it saturates. Baking soda neutralizes acidic compounds. Fragranced products mask rather than remove, and plenty of people find that worse. Which you need depends on the can.

What is the best trash can deodorizer?

For a kitchen can, a carbon filter or pod in the lid where the odor collects. For an outdoor cart, a baking soda powder applied over each bag. A pod in an outdoor cart is too small a treatment for that volume of air.

Does baking soda work in a trash can?

Yes, on acidic odor compounds, and plain baking soda is the same active ingredient as the commercial powders without the fragrance. Replace it monthly — it saturates like any other absorbent.

Are scented trash bags a good idea?

They mask rather than remove, and many people find trash plus artificial fragrance worse than trash alone. Odor control built into the bag film is more useful than a scent, and fixing the can beats both.

How often do you replace a trash can deodorizer?

simplehuman states about 45 days for its pod, Fresh Wave states 15-30 days for its packs, and carbon filters are generally one to three months. None gives you a visual indicator, so it is a calendar job.

What is the cheapest way to stop a trash can smelling?

Freeze food scraps until collection day. It costs nothing, it is more effective than any product, and it works because frozen waste does not decompose at all.

Sources

Every specification on this page traces to one of these, checked at the time of writing. Where a manufacturer does not publish a figure, the page says so rather than estimating it.