When you have a lot of time, you can figure something stuff out

I came up with a storage container that reveals itself only when somebody else opens a chest. It is not tested or made. I don’t think it works.

Well with the use of a trapped chest, some redstone torches, and about four or so sticky pistons, it would work

I am gonna redo the original design, because the design was to use a trapped chest to turn on a piston, which lowers the trapped chest, revealing a form of storage between the piston. It sucks so I will just come up with another design.