Fellow Atmos Vacuum Canister 1.2L - Matte Black

I tested beans at 1 week, 2 weeks, 4 weeks and 8 weeks in the Fellow Atmos Vacuum Canister vs. ziplock in the freezer. The beans were Ethiopian single origin from the same roast (by a friend, and great roaster in LA - Trystero). The method was Hario pour over with the same bean to water ratio (20:400) and always freshly ground. After the initial wetting of the 8 week beans (with a 45 second seep), the vacuum sealed beans in the Fellow canister still weren't caving in once the carbon dioxide bubbled out (I read that as still fresh) while the frozen beans were. More importantly Fellow won out on sustaining flavor profile (especially after 8 weeks). The differences are admittedly subtle but they are there.I'm not a scientist, and my freezer does have a defrost cycle ... MoreI tested beans at 1 week, 2 weeks, 4 weeks and 8 weeks in the Fellow Atmos Vacuum Canister vs. ziplock in the freezer. The beans were Ethiopian single origin from the same roast (by a friend, and great roaster in LA - Trystero). The method was Hario pour over with the same bean to water ratio (20:400) and always freshly ground. After the initial wetting of the 8 week beans (with a 45 second seep), the vacuum sealed beans in the Fellow canister still weren't caving in once the carbon dioxide bubbled out (I read that as still fresh) while the frozen beans were. More importantly Fellow won out on sustaining flavor profile (especially after 8 weeks). The differences are admittedly subtle but they are there.I'm not a scientist, and my freezer does have a defrost cycle (most of them do). I wasn't measuring temperatures of either the test subject or the control (in this case the freezer), but I still remember the scientific method from Ms. Tripple's 8th grade Science Lab and I took copious notes, both on the method and the tasting profile of the coffee. I'm going to go ahead and order another canister for Trystero's Vietnam single origin... and maybe a 3rd for (god forbid) their decaffeinated "there is no U in Colombia" after drinking this much caffeine.

I own both Atmos and Airscape canisters. Both are very good and noticeably increase the freshness of contents. For coffee beans, I prefer the Atmos — mainly because I personally find the opening/resealing mechanism more efficient than the Airscape, which makes my time-poor mornings that little bit easier. When closing the Atmos, I can whack the lid on and twist the air out as I take the few steps over to the shelf where I store it. Whereas with the Airscape, because of the 2 piece closure, I need to push the inner lid in while it still sits on the bench, then pick up the outer lid and whack that on, and only then pick it the canister to put it away. I realise that may seem nitpicky, but I find it makes a difference to me.The Airscape I use for biscuits and the ... MoreI own both Atmos and Airscape canisters. Both are very good and noticeably increase the freshness of contents. For coffee beans, I prefer the Atmos — mainly because I personally find the opening/resealing mechanism more efficient than the Airscape, which makes my time-poor mornings that little bit easier. When closing the Atmos, I can whack the lid on and twist the air out as I take the few steps over to the shelf where I store it. Whereas with the Airscape, because of the 2 piece closure, I need to push the inner lid in while it still sits on the bench, then pick up the outer lid and whack that on, and only then pick it the canister to put it away. I realise that may seem nitpicky, but I find it makes a difference to me.The Airscape I use for biscuits and the like and I find it makes an appreciable difference to how fresh they keep and for how long. Love it for that purpose. But for daily bean use, Atmos is my go.That said, the size of the Atmos canisters confound me. The small one is too small to hold 250g of beans. I estimate it holds 150g — that’s including leaving ~1cm of space from the rim as I find not having beans pressed right up to the bottom of the lid where the little holes are both keeps the seal better and is less likely clog the holes with minute particles (esp since you can’t wash/soak the lid). Even without leaving that buffer, it will not contain a standard 250g bag. On the other hand, the medium size (which is the latest one I’ve purchased), is just that bit too large. Yes, it will hold 250g of beans; but there is slightly too much surplus space, which obviously increases as beans are used. In practice, this means that the lid requires quite a few more rotations to evacuate air and achieve that ‘tight lid’ feeling. It takes longer and is definitely noticeable.What I’ve started doing, since I have the small and medium size jars on hand, is to put a new bag of 250g beans in the medium canister, then transfer them to the small canister when I’m down to ~150g beans so that they will now fit. It’s the best solution I’ve found for me and I’m happy with it. What works for you may well differ.On a side note, for both Atmos sizes Ive found that very fresh beans will cause the canisters to lose their seal if the jar is not opened for 2 or 3+ days. Personally, this doesn’t generally affect me as I open mine every day. But there has been occasions where I’ve been away for a 2+ days and have come back to find the seal button has popped up, indicating it has been sitting there for x amount of time not vacuum sealed. Just a heads up — may be beneficial to reset the seal if you aren’t going to open it for a few days.

Keeps my beans fresh for days. Didn't experience the loss of vacuum like other reviews said. The 0.7 L size keeps 250 g coffee quite nicely. I had the black lid with clear glass, which allows me to see how much beans left. I store the canister in a cabinet so it away from light and heat.It doesn't take many twists to reach vacuum stage. I did thought a full green button appears and was wondering why the green button doesn't show up after so many twists. Turns out it's a little green ring that appears. Wish it was a bit more obvious, but it works for now.