Metal Barrels Mod (1.18.2, 1.16.5) adds more barrels to the game, which can hold more items. They work just like vanilla counterparts, in that they can be opened by placing a block on top.
Metal Barrels Mod – 1.18.2, 1.16.5 – Better than Iron Chest
- Copper stores 45 stacks
- Iron stores 54 stacks
- Silver stores 72 stacks
- Gold stores 81 stacks
- Diamond stores 108 stacks
- Obsidian stores 108 stacks but has a blast resistance of 30 thousand making it resistant to most explosions
- Crystal stores 108 stacks but the top 8 items can be seen inside (Note: unlike the other barrels, having a large number of these with items inside will impact fps negatively)
As of the newest version, there are now upgrade items that can be used to upgrade already placed barrels without breaking them, the contents will not be destroyed or dropped if used.