First order: Buy 2, Get 1 Free · Fits regular-mouth jars · 60-day guarantee
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ROKUME · Mason Jar Vacuum Sealer

Take the Air Out of Your Mason Jars With One Press — and Stop Throwing Out Food You Paid For

Food doesn’t go bad on its own. The air trapped under the lid does the damage. One press pulls it out of the jars you already own. No bags. No hose.

  • ✓Open the fridge on Thursday and still find Sunday’s shopping ready to eat.
  • ✓Buy in bulk again without the guilt of throwing half of it away.
  • ✓Pulls out the air that turns food stale and lets mold grow.
  • ✓Screws onto the regular-mouth jars already in your cupboard.
Color: White
Choose your offer
3 SealersNow included in Buy 2, Get 1 Free $165
60-day guaranteeFree sealer added at checkoutArrives in 6–12 days
Try it for 60 days. We pay the return shipping.

Seal your jars. Check them in two weeks. If it isn’t right for your kitchen, send it back for a full refund.

Questions people ask first

I already have a bag sealer with a jar attachment. Why would I need this?

Because you’d have to get it out. A jar attachment needs the base machine, a hose, and a plug, so most people use it once or twice and put it away. ROKUME is one small cordless piece that screws right onto the jar. Easy enough to leave on the counter means you’ll actually use it.

Will it fit my jars?

Yes, if they’re regular-mouth mason jars. That includes Ball, Kerr, Bernardin, and most store-brand mason jars.

Do I need to buy special lids?

No. It comes with 10 stainless-steel sealing lids so you can start right away, and there are no bags to keep buying.

How long does the seal actually hold?

The easiest way to know is to check it yourself. Seal a jar and look at it again in two weeks. If the lid has popped up or comes off easily, send it back within 60 days. We’ll pay the shipping.

Won’t this end up in a cupboard like my last gadget?

Fair question. The last one probably wasn’t broken — it was just too much work to use. This is one button, and it stops on its own, so it stays out. And if it doesn’t earn its spot, return it within 60 days.

Before you buy

The three worries we hear most

Straight answers, so you don’t have to guess.

The worry
“A cheap hand pump does the same thing.”
A hand pump can work. But you’re pumping by hand for every jar, every time. One press is the difference between something you try once and something you keep doing all year.
The worry
“Is it strong enough to really hold a seal?”
Lots of sealers run on a timer and stop whether the air is out or not. ROKUME is the upgraded K-80S model. It keeps pulling until the air is out, then stops on its own. Then check it yourself on day 14.
The worry
“I don’t have time for another kitchen project.”
It isn’t one. Fill the jar, put the lid on, press once. It stops by itself when the air is out.
Why we made it

Started on a farm that was tired of throwing food away

“Every summer, my family’s farm grew more than we could sell at market or eat at home. Berries went fuzzy in a few days. Greens went slimy before the weekend. I was throwing away food I’d worked all season to grow. Freezing and bag sealers took too long in the middle of a harvest, so I set out to make sealing a jar as quick as closing it. That’s why I started ROKUME.”

Greg Villani, founder of ROKUME

How it works

Food doesn’t spoil on its own. Air does most of the damage.

Three things happen inside every container with a normal lid.

1

Oxygen makes food stale

It’s the same thing that turns a cut apple brown. It makes nuts taste old and coffee taste flat.

2

Mold needs air to grow

The gray fuzz on berries and bread can’t spread well without oxygen. Less air, less mold.

3

Ripening gas gets trapped

Fruit gives off a gas as it ripens. Under a normal lid it has nowhere to go, so everything ripens faster.

Your fridge slows all three down. It can’t stop them, because the air is still in the jar.

How to use it

Three steps. One button.

A hand setting a flat metal lid on a mason jar of strawberries
1

Fill and close

Fill your jar and set a flat sealing lid on top.

A finger pressing the top of the white ROKUME sealer on a jar of strawberries
2

Screw on and press

Screw ROKUME onto the jar and press the button once.

3

It stops by itself

When the air is out, it shuts off. Unscrew it. That’s a sealed jar.

Who it’s for

Made for people who hate wasting food

It’s a great fit if you…

  • Buy in bulk or shop at warehouse clubs
  • Grow a garden or get a farm box
  • Meal prep for the week ahead
  • Store flour, rice, nuts or coffee in jars
  • Are tired of throwing out produce you paid for

It’s not meant for…

  • Replacing pressure canning
  • Keeping fresh or cooked food safe outside the fridge
  • Jars with chipped or cracked rims
Compare

Why not just use what’s already out there?

Every option below can keep air out. Only one does it with the jars you own, in one press, with nothing to plug in or keep buying.

What matters ROKUME Bag vacuum sealer Jar attachment for a bag sealer Manual hand pump
Uses the jars you already own✓Yes✕No✓Yes✓Yes
No bags to keep buying✓Yes✕No✓Yes✓Yes
No hose or base machine✓Yes✕No✕No✓Yes
One press, no pumping✓Yes✓Yes✓Yes✕No
Cordless✓Yes✕No✕No✓Yes
Open and reseal for free✓Yes✕No✓Yes✓Yes
Small enough to leave on the counter✓Yes✕No✕No✓Yes
The technology

A vacuum you can open

Bags are one-way: cut one open and you need a new bag. A sealed jar opens and reseals as many times as you like, for nothing.

Screws right on

It screws onto the jar and pulls the air out. No bag, no hose, no base machine.

Stops on its own

It senses when the jar is sealed and shuts off. No guessing, no holding a button down.

Reseal anytime

Take out a handful, put the lid back, press once. The jar is sealed again.

What’s in the box

  • ROKUME vacuum sealer
  • USB-C charging cable
  • 10 stainless-steel sealing lids
  • Jars not included — use your own

Specs

Fits
Regular-mouth jars
Colors
White or black
Auto-stop
Stops when sealed
Display
LED, one-button start
Charging
USB-C, built-in battery
Power
5 W
Size
4 × 4 × 4 in (10.2 cm)
Weight
1.2 lb (540 g)
Model
K-80S (upgraded)
Warranty
60 days
Your first 60 days

What happens after it arrives

Day 1

Charge it and seal your first jars

Start with the food you throw out most — berries, greens, whatever usually goes first.

Day 3

Open, take some, reseal

Grab what you need, put the lid back on, press once. This is the habit that saves the most food.

Day 14

Do the seal check

Look at a jar you sealed on day one. Lid still pulled down tight? That’s your proof, in your own kitchen.

Day 60

Keep it or send it back

Your guarantee runs this long. If it isn’t right for you, return it and we’ll pay the shipping.

More questions

Everything else you might want to know

Can I use it instead of canning?

No. Sealing a jar helps food stay fresh longer in the fridge or freezer, and keeps dry goods fresh in the pantry. It does not make food safe to store at room temperature the way pressure canning does. Keep perishable food refrigerated.

Can sealed jars go in the freezer?

Yes. Leave some space at the top of the jar, because food expands as it freezes.

What foods work best?

Berries, cut vegetables, salad greens, nuts, coffee, flour, rice, crackers, and meal-prep portions. The storage guide in the box lists what to seal and what not to.

Launch offer

Stop feeding the fire in your fridge.

Take the air out of the jars you already own, and keep the food you paid for.

Buy 2, Get 1 Free is for first orders only
  • ✓Fits regular-mouth mason jars
  • ✓10 stainless-steel lids included
  • ✓60 days to try it · we pay return shipping
Color: White
Choose your offer
3 SealersNow included in Buy 2, Get 1 Free $165
60-day guaranteeFree sealer added at checkoutArrives in 6–12 days
Get ROKUME