If you have dabbled with adjusting container layouts in-game and created something you like, feel free to share screenshots here.

If the layout is both appealing and balanced, I may add it as a default to the mod.
Please keep in mind these suggestions should be inline with default mod balance, as described below.

Keep it simple. A single grid is usually preferred so that large items are able to fit.

They MUST have some form of class restriction on the allowed items.
The container should be either a rare find or thematic.
i.e. The First-aid Kit. Takes up 4 slots, holds 16 slots. Only allows medical items.

Keep the total slot count close to (weight capacity * 2). It doesn't have to be exact.
This is the most open category, have fun with it.

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TARDIS Container
Any container that is bigger on the inside.

World Container
Containers that the player can't carry around and use as a bag.
Things like a fridge, a shelf, a bookcase, a crate, etc.