Diopter case for Fatshark strap

During the day I usually wear contact lenses but in the evening I often take them out and put my regular glasses on. Without the contacts, in need to put in correction diopters into my Fatshark FPV goggle but then of course the next time I'm wearing contacts the diopters need to be removed...

Because of this back and forth I wanted to have a safe place to stow my diopters and so I made a diopter case which attaches to the head strap of the goggle.