no freezer for coffee or beer mugs. it is my undertanding that as water freezes and crystallizes it absorbs all kinds of odors and flavors that exist in your freezer. so if you're putting your coffee and/or beer mugs in the freezer you're adding all kinds of nastiness to your brew. if you're using airtight containers in the freezer as Troy said, well, I guess you're ahead of the game.
airtight containers at the bottom level of the pantry is the best IMO. we've got tile in our kitchen so it stays a little cooler...we've got the fancy ceramic containers with the airtight latch.