Satchels instead of Bundles

As a solution to the problems integrating the bundle into pocket edition, I propose a different item called the satchel. It equips to your offhand slot and can only be accessed once in the offhand. It would have 3-5 slots of storage, and be keybinded to an unused key or button/trigger that the player would press and hold for pc and console to acces the satchel. For PE it would have a separate button show up on the offhand side of the hotbar that you hold to access the satchel storage. In the inventory, the slots appear vertically next to the inventory slots. Outside of the inventory they would appear above your hotbar where items could be added to your hotbar and then used. The functionality would be balanced by not allowing the player to sprint while it is being accessed. The other option I thought of would be to only be able to use it while sneaking, similar to the shield. Also a possibility for mounting to horses and being accesed in the horse inventory. I sincerely hope this reaches the dev team at Mojang.