Just like it sounds
My idea is make little bags like the seedbag fit into the equipment in the belt slot
there should be different kinds of bags
seedbag: this is already in the game
rocks sack: ammo for the sling (very usefull)
coin bag: very good for the late game economy (for the ones who use it)
waterskin: you know everyone wants this
even if you can't use em in the belt slot, the rock sack and the coin bag are very needed things