The coffee supply chain is long and loving. The number of people who play a role in getting your favorite coffee beans to your kitchen is truly extraordinary. We created Atmos Vacuum Canister to be the final bit of love in this chain before you brew. By simply twisting the lid back and forth, Atmos sucks air out to prevent oxidation and extends coffee’s shelf life by up to 50%. The care put into each and every bag of coffee can now last longer.

Since Atmos is a new technology, we’re sure you have a few lingering questions you need answering before bringing it home. We combed our social media comments and customer service emails to round up the most frequently asked questions:

What exactly is a “vacuum canister”? I thought my coffee bag was airtight!
First off, let’s define what a vacuum is. A vacuum is a closed system in which pressure is less than atmospheric. In order for this to happen, you need a constant amount of space (i.e. a rigid container) where air particles are removed. There’s a lot of airtight containers/bags out there that get rid of some air, but these aren’t necessarily a true vacuum. An easy way to tell if you don’t have a vacuum container is if your container shrinks (i.e. is it a bag or does it have a lid that collapses into the container). If your container shrinks, it is not a vacuum and will not decrease the pressure below atmospheric.

Uhh Fellow, Atmos is definitely not the first vacuum canister on the market. What makes Atmos “special”?
Unlike other vacuum canisters, Atmos does not have an external pump or part that attaches and detaches. The magic of Atmos is all in the lid. This makes removing air from Atmos super simple. Also, the vacuum mechanism in Atmos is so strong that it reduces internal pressure down to half an atmosphere. In fact, pressure is so important to coffee freshness that we wrote a full blog post on it.

Since Atmos is a sealed environment, will this mean there is a buildup of CO2?
Commercial coffee bean bags with CO2 degassing valves are designed to relieve CO2 pressure build-up and prevent bag rupture, not to necessarily keep coffee fresher for longer. In a vacuum chamber, the pressure is low enough that CO2 buildup is not a concern. CO2 in the air around the beans is non-reactive and will not affect the flavor of the coffee. CO2 does, however, affect your coffee’s flavor once you start brewing, so make sure to bloom your bed of grounds before brewing!

How much coffee does each Atmos hold?
Atmos is available in three sizes. The .4 L Atmos holds up to 6 oz of coffee beans, the .7 L canister holds up to 10 oz of coffee beans, and the 1.2 L canister holds up to 16 oz of coffee beans. But remember, some varietals of coffee beans are bigger than others (looking at you, Pacamara).

Can I store ground coffee in Atmos?
Nope! Powdery or ground substances do not play well with the seals and can clog the intake valve. Since we always advocate for coffee to be ground right before brewing, Atmos was never designed for the intention of storing ground coffee. In addition to ground coffee, please avoid putting any powdery substances inside Atmos such as spices (like turmeric), flours, and matcha tea.

No coffee grinds or powdery substances, got it. What else is good for storing in Atmos besides coffee beans?
The sky’s the limit. Atmos extends the shelf life of your pantry items, too. Toss in loose leaf tea, nuts, cereal, cookies, granola, candy, and other plant-based things you have in your house

Can I put Atmos in the freezer?
You can freeze Atmos, but it’s not the best use of the product. Since coffee beans should be frozen in individual servings as to not refreeze and freeze beans continuously, Atmos doesn’t make the most sense. Atmos is intended to hold multiple servings, so it would be a waste of space in your freezer to put only one serving of beans inside. Also, placing Atmos in the freezer will also eventually reduce the life-span of the vacuum seal.

Why did you make a clear glass Atmos if sunlight is a big contributor to coffee freshness?
If you anticipate storing coffee in your cupboard or a shaded area, clear glass is great! You can see the contents, which is especially important if you’re storing pantry items. But if your brew station is near a window or want to put your Atmos Vacuum Canisters on display, then our matte black stainless steel makes more sense. We think both designs are beautiful, so it comes down to your preference and needs.

I have more than one Atmos. How can I label them to tell the difference?
If you have a clear glass Atmos, you can use chalk pens or whiteboard markers. Both of these options will wash or wipe off. Also, if you have the largest size, you can keep the beans in the bag and put the bag directly inside of Atmos. For the matte black stainless steel, we don’t recommend writing directly onto the body. We love using a strip of washi tape on the bottom.

And lastly, a boring but necessary question. How do I clean my Atmos?
Atmos is not dishwasher safe. When it comes to the lid, please prevent liquid from getting inside and do not clean the lid under running water. Instead, clean with a damp, non-abrasive sponge and use mild soap, if needed. For thorough cleaning, the gasket and filter can be removed and washed separately. Similarly, we recommend hand-washing the stainless steel and glass canister with a damp, non-abrasive sponge and mild soap. Using a coarse sponge, brush or other rough surfaces will scratch the finish of the lid and canister.

If your question didn’t make the list, don’t hesitate to reach out to our customer service team at We’re here to help!