I did the same thing! A couple of years ago, before my surgery, I had 1/2 a pkg of all beef hot dogs in the fridge for emergencies. The day after I put them in there, 1 was missing. The next day, another was missing. So, I put a yellow sticky note on them that read:
"Please, help yourself, as you have been.
P.S. I pre-licked them for you!"
No more disappeared.