With Alpha 21, one great aesthetic feature is that many of the lootable blocks in the world update visually to show they have been looted.  The downside to this is that those blocks are also changed to static blocks with no accessible inventory.  Prior to A21, many players liked to use those existing containers to store their resources when they take over a POI to turn it into a home.

With this mod, you will be able to use any of the upgrade tools (Stone Axe, Claw Hammer or Nailgun) to upgrade those blocks into player storage variants.  The current containers you can upgrade back into player storage are as follows.

Stoves
Microwaves
Dishwashers
Refrigerators
Washers and Dryers
Gas and Charcoal Grills
Desks
File Cabinets
Nightstands
Lockers
Safes
Medicine Cabinets (mirrored ones in bathrooms)
Pill Cases
Foot Lockers
POI Chests (Military, Rotten, Old West, etc.)
Toolboxes
Armoire Drawers
Gun racks
Commercial freezers (Left and Right freezers are not usually loot containers and have no "Full" model, so they will still look empty when upgraded)
Camp coolers

This is just an XML mod and can be used server side only if needed.

The idea behind using the upgrade event was suggested to me by someone during a stream I was watching on Twitch.  (Gazz_Again, I believe)