Oxo manufactures a variety of items to help households run smoothly, including its line of Pop containers. The 1.6-liter option is specifically designed for coffee, and it's one of the best values compared to other coffee canisters out there. These robust jars are built to withstand the test of time and are also perfect for other perishable products, such as biscuits or dried fruit. Great coffee means FRESH coffee. And the primary way to keep your beans from losing their flavour and punch is to keep public enemy number 1 – aka oxygen - away from them. This problem is no different than what you’ve probably observed with freshly baked chocolate chip cookie. Even if you put bread in a sealed, airtight bag, it will still begin to stale over time. To fix this, you need to remove all the air from the bag. Thankfully, the smart folks over at Fellow found just the way to do that with the Atmos. Why Atmos?

While glass isn't the best material for a canister, as exposure to sunlight causes coffee to go stale faster, the Bodum Yohki storage jar tested well enough that it deserves inclusion on this list. (It even outperformed several stainless canisters that we tested.) Just try to keep it out of direct sunlight if possible. You can find the Le Creuset Storage Canister in three sizes, starting at 23 ounces and working up to this 2.5-quart model. This offers the chance to buy a matching set in various sizes should you want to store other kitchen goods, like sugar and flour. The canister is dishwasher-safe, although the lid is hand-wash only. If you like the product and want a full set for your kitchen, Planetary Design produces the Airscape in two other sizes: a small canister, which holds 8 ounces of coffee, and a medium-sized one, which can store up to 1 pound. All options are sold at reasonable prices—even this bulk one. A large part of what makes the item effective is its cork lid. It takes a firm push to get the lid on, indicating that the silicone gasket forms an airtight seal. Yet, it's not difficult to put the lid on; instead, it's just the right amount of tension. After storing whole-bean coffee in the canister for eight days, it came out fragrant and made a flavorful brew. We stored ground coffee in the canister for another eight days and it came out less vibrant but still sufficient. It's also convenient that the canister is dishwasher-safe, which isn't the case with many other models we tested.It’s been pretty neat to see how strong the vacuum in the unit is; we haven’t been able to remove the lid yet without first depressurizing it. Other Uses

Green coffee refers to coffee beans that haven't been roasted yet. This is also called "raw coffee." Green coffee beans should typically be roasted within one year of purchasing them. Otherwise, they may lose their flavor. That said, some roasters choose to age coffee beans for multiple years to accentuate certain flavors in the beans, similar to aging wine or whiskey, but this is an intricate process that only works with certain varieties of coffee. Each Atmos is made up of three main parts: the canister base, the silicone seal, and the vacuum lid. When the device is pressurized, the silicone seal is the ultimate harmonized between the base and the lid. It keeps the unit airtight and prevents any damage from the lid compressing against the base. Functionality This canister is available in three sizes and multiple colors. The medium canister, which we tested, comfortably holds 1 pound of ground or whole bean coffee. We filled the canister with water and shook it upside down over the sink to test the integrity of the airtight seal. Not a single drop of water escaped, showing how well your coffee beans will be protected inside. The item should not be put in the dishwasher, but we washed inside the canister with a sponge without issue.

Overall Score: 4.8/5

What really sets this canister apart is its inner lid, which you press down via a handle to remove the air from inside. Out of the 15 canisters we tested, this one tied for first place in freshness and flavor, largely due to the effectiveness of the inner lid. The Airscape is also one of the easiest canisters to clean (even though it's not dishwasher-safe) because its large size allows customers to reach all parts inside with a sponge. Old Dutch International Canister Set: This four-piece hammered copper set takes something timeless and mixes in new-age elements, such as silicone gaskets. However, the airtight seal wasn't the best. It was difficult to fully close the lids on some of the canisters in the set, indicating that air was getting in and out. The ones that did close were difficult to open and shut. It requires two hands and a lot of effort to remove the lid and get to your coffee beans. This is an updated version of a previous Oxo coffee canister. The two are similar in size, price, and design, but the newer model comes with a couple of upgrades, especially regarding its ease of cleaning. It is now dishwasher-safe (aside from the lid) after previously being hand-wash only. Over time, you may find that your Atmos gets dirty from coffee oils or cookie crumbs. Follow the care instructions outlined above and you’ll be all set to use your Atmos again after it dries. Other Considerations

When you first open your Atmos, you’ll want to clean the entire unit before its first use. There are separate cleaning instructions for the lid and the canister. Don’t clean the lid under running water or submerged it. This can cause all kinds of problems with the vacuum pump. You’ll want to separate the lid from the filter and the gasket. The gasket is the rubber ring that holds the metal filter onto the lid. You can wash the filter, gasket, and canister with soapy water and a non-abrasive sponge. The lid should be cleaned with a damp cloth, but make sure not to let any water get inside. One of the best ways to keep coffee beans fresh is by protecting them from oxygen, and few kitchen containers do a better job of that than the Fellow Atmos Vacuum Canister. In fact, the brand says its canisters increase coffee shelf life by roughly 50 percent. After testing, we confirmed that the canister keeps coffee fresh longer than other options, though we can't definitively corroborate the 50 percent claim. We also performed a follow-up test with the Atmos in a different size (1.2 liters as opposed to 0.4 liters) and, again, found the results above average. Le Creuset is well known for its colorful cast-iron cookware, and these stoneware canisters capture the brand's signature style. They are available in several eye-catching colors, from a cherry red to an elegant white, so every customer should be able to find an option that matches their kitchen décor. The canisters also have a wooden lid for a nice accent. Whole bean coffee freshness: We performed a similar test with whole beans that we did with ground coffee, storing half a bag in each canister and the other half in the bag over the course of eight days. We made notes on color and aroma of the beans before and after storage, and prepared a cup of coffee with the canister- and bag-stored beans to compare their flavor. As a further test of post-storage freshness, we sealed a few beans in zip-top bags and watched to see if the bags puffed up. (Fresh coffee beans produce carbon dioxide, which gradually inflates a sealed bag.) Stainless steel is the most common material for a coffee canister, but plastic, ceramic, copper, and glass are all options, too. One key detail to look out for is whether the material is translucent and would expose coffee beans to UV rays, which would make them go stale faster. This mainly applies to plastic and glass. Another concern is durability. Would you prefer a more durable material like stainless steel? If aesthetic the biggest factor, you may prefer something that stands out more, like ceramic or copper.The design of the Atmos is very modern, sleek, and sophisticated. Whether you opt for the glass or the matte design, you will not be disappointed. As with any kitchen appliance, there are specific ways to clean and maintain your new Atmos. We’d like to preface this section by letting you know that the Atmos is not microwave safe, dishwasher save, or oven safe. If you want your Atmos to last awhile, we recommend not putting it in any of those places. First Use This smart Atmos jar banishes air, moisture, and odours from inside with a clever vacuum feature to stop your beans from ageing out before you’ve enjoyed them.