Backpack Feedback

I know that bundles are a thing but lots of people dont think it is enough so what if we had backpacks. Made with a chest in the middle, leather or rabit hide on the top, left, right, and bottom middle than string in the corners. In sted of 27 or 9 slots it wil have 15 slots in it, 3 rows of 5. It is not like a shulker box, can't be put in shulkers but i cant be placed in chests and i will be able to be placed down. and to open it you need to crouch and right click it to open it. Like the backpack mod- your able to open it while on your back but in this update feedback you can't only of it is placed down, but if you are on multiplayer other players can open backpacks that you put on your back. And backpacks have pockets so you are able to access them just like the backpack but your able to access them while on your back. The pokets only have 1 slot for each side of the backpack(left,right)