Don't Untune My Guitar

A problem I've faced a lot as a guitarist is it going out of tune after it being placed in a position that moves the knobs out of tune

Supplies

Cardboard.

Hot Glue.

Step 1: Stack a Few Cardboard Surfaces for Stiffness.

Not sponsored by domino's pizza.

Step 2: Stick a Piece of Thickened Cardboard to Prevent This From Happening.

Step 3: To the Sides So the Knobs Won't Rotate When Kept Like That.

Step 4: Add Some Colors.