The canisters are also magnetic on the bottom, even though I don't put that feature to use. As you can see, the top of the canister is translucent plastic, so you can see the tea inside. As a result, I usually keep all of my canisters covered in small wooden boxes so that they are not exposed to light often.
So far, it seems like a convenient, cheap (canisters are only $3 each) and space-saving way to store teas, especially seeing as I rarely buy more than 50g of any type at one time. The clear tops also make for a nice visual presentation when someone comes to my house and wants to choose a tea to drink.
How does everyone else tend to store their teas?