I know I'm crazy... no news there.
BUT, the old cookoo clock is always ticking...
Think about this:
Oxygen is required for corrosion, right?
What if your case had a seal around the opening lid, and a small compressed nitrogen bottle inside...
Once you wipe down the trumpet to remove hand acids, close the case, seal the lid, press the air purge button, and the nitrogen canister releases enough volume to push out the air through the one way bleed valve, and the case is now filled with nitrogen until opened.
The canister is removable and easily refillable at car service stations and tire centers.