I drink quite a lot of coffee.
Every weekend, I make my own coffee from ground coffee bean at home.
It's such a waste to dump the leftover, so sometimes i dry it under the sun and keep in a bottle.
Coffee leftover can be used to absorb moist and stink.
So I sew a small bag with used fabrics and fill in the leftover.
Then put them in your wardrobe, shoe cabinet or inside your shoes.
But remember to remove them after a period of time, that's when you feel the bag absorbs enough moist ( and before they started to grow mould).
It's just like an organic moist absorber. =)