How should they work?
Can only own 1 (lost on death or saved?)
Can own multiple, each with their own ability to save runes
Can own multiple, but their inventories are linked together (in other words you couldn't rotate pouches in your inventory to get different runes)
Also, what should happen to your pouch if you were to lose it on death? On OSRS you would lose the pouch entirely, but should you keep the pouch itself here?
We also need to decide how to obtain it and for how much.