If so, you're not alone.
A new survey from online grocer Peapod.com found 71 percent of people had food and drinks stolen from a work refrigerator.
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Men were nearly twice as likely as women to admit to have taken food that didn't belong to them.
Only about a third of those surveyed admitted taking something that wasn't theirs.
So how do you prevent your lunch from being stolen?
One company sells anti-theft sandwich bags, which has green spots that look like mold. The mold look aims to fend off lunch poachers.