Sometimes you may forget, but that's ok. They're made out of “edible paper”. Even the glue holding the stickers to the fruit is food grade. AOL App; AIM; A listing of all AOL sites, from A to Z The labels are perfectly edible. Thus far, it's only been approved for use on citrus fruits. A New York inventor is working on making a fruit label that dissolves in water. Origins: Most shoppers are familiar with PLU code stickers on fresh produce, commonly removed prior to the consumption of portable fruits like Missing: list citrus.