Assets like Barrels, Crates and Chests do have an open and closed version, the closed version does not have an interior, so you can save performance.

There are currently 23 Prefabs in total

5 Barrels ( Open and closed versions )

2 Buckets

2 Chests ( Open and closed version )

4 Crates ( Open and closed versions )

1 Dagger

6 Jugs

1 Key

1 Sword

1 Waraxe

URP compatible: If you see Pink Materials, make sure to Uprade the Materials to the URP Render Pipeline ( Edit -> Render Pipeline -> Universal Render Pipeline -> Upgrade Project Materials to UniveralRP Materials )

HDRP compatible: If you see Pink Materials, make sure to Uprade the Materials to the HDRP Render Pipeline ( Edit -> Render Pipeline -> HD Render Pipeline -> Upgrade from Builtin pipeline -> Upgrade Project Materials to High Definition Materials )

for more information have a look at Technical details.

If you have any quesitons or suggestions , feel free to contact me =)