I wound up buying one of those air-evacuating Airscape coffee canisters. It comes with a plunger-style inner lid that squeezes all of the air out, right down to the level of the coffee. Works great and I’m happy with it.
This Cozium Press Seal Container works similarly, except the entire container can be nearly halved in height as you consume the contents.
Due to the design, you can’t get all the way down to the bottom, as you can with the Airscape (if that really matters to you). But at $15 a pop, they’re cheaper than the $36 I paid for the Airscape.
