Favorite Mundane Item.
The Hammer. Yes that is correct, my absolute favorite mundane item is the 5 silver piece hammer. You can use it to do so many things, some that you won’t even think of until you are in the heat of the moment and need a quick plan.
In real life I have used a hammer to cut metal, to open my car steering column, hammer in nails, and many more things. Really the creativity of the players is the only limit on the uses.