Stick a sock in it.

Trigger is sockgagged

Reinforce with sockgag if needed.

To make sure it stays in, you can tape over it with transparent tape over mouth. That way you can still enjoy the sight of the sock underneath. If this needs reinforcing, please add tape gag, improvised gag.

Sockgagging should give you that act of the gag being applied - using hands in addition can help.

Sockgags are by default white, as everyone knows. However black sockgag works. Can't vouch for other colors.

Up to you if you want to use the sockjob lora first, before you stuff it in :D