Upgradable Backpack
The mod adds functional backpacks to Minecraft with upgrade capabilities. You start with a basic 9-slot version that can be sequentially upgraded to 18 and 26 storage slots.
Main Features
- Changing backpack color through crafting table
- Renaming using an anvil
- Three capacity levels: 9, 18, and 26 slots
How to Use Backpacks
To access contents, simply drop the backpack on the ground. It will transform into a barrel where you can manage items. To return it to its original state, click the "Exit" button. Backpacks can also be worn in the chest slot for decorative purposes.
Crafting and Upgrading
To craft backpacks, first create a special work table. Simply drop a stone pickaxe on a crafting table block.
Basic 9-slot backpack:

Upgrade to 18 slots:

Upgrade to 26 slots:

Visualization
To display the backpack on the character's back when placed in the chest slot, you can install Optifine (optional).
Demonstration
Watch the video to see the backpacks in action!