Those two brands are, but most coffee is sold in vacuum sealed bags like the rest of the world.
Folgers and Maxwell House are pre-ground. The containers do a better job of keeping oxygen out. Pre-ground coffee goes bad quickly the more it’s exposed to oxygen.
There are some pre-ground Italian espresso brands that are famous for doing similar things.
Why is American coffee in plastic containers?
Those two brands are, but most coffee is sold in vacuum sealed bags like the rest of the world.
Folgers and Maxwell House are pre-ground. The containers do a better job of keeping oxygen out. Pre-ground coffee goes bad quickly the more it’s exposed to oxygen.
There are some pre-ground Italian espresso brands that are famous for doing similar things.