Skip the fridge. It is humid, it smells like everything you store in there, and it warms and cools all day long. The freezer is fine as long as you pack the coffee tightly and keep it sealed until thawed. Valves do little for ground coffee. Real gains come from airtight storage, very little empty space in the container, darkness, and cooler temps. Portion once, then handle quickly with dry tools. That combo slows down the slide more than any gadget.
