Do you have out of date personalized address labels lying around? Or even just ugly ones that you get as a “fabulous free gift” for some reason or another. If so, bring them to work and use them to label your frozen meals for lunch with your name so no one steals them.
I’m sure that someone else has probably thought of this but I just thought of it so I don’t have anyone to attribute it to. I just got tired of writing my name on every single facing of my frozen meals. That’s the only way they won’t get eaten by someone else.