Food expiration dates are garbage. Here’s a new label that’ll make you think before you toss.

Food expiration dates are for wussies. No seriously, they’re really not that important. Dates on labels like “best by,” “best-before,” or “enjoy by” are actually just guidelines from food manufacturers advising retailers when they think their food will be the tastiest. More often than not, most food is edible for days or weeks after the suggested date on a label.

That means most of us are probably throwing away hard-earned groceries. We toss about 40 percent of all the food we buy, or more than 20 pounds per person each month. Cue Bump Mark, a new food label meant to safeguard against unnecessary tossing.

The label is made of four different layers from top to bottom: plastic film, a layer of gelatin, a plastic bump sheet, and another piece of plastic film. As the food inside the package starts to decay, so does the gelatin in the label. By the time both the food inside and the gelatin have expired, all that’s left on the label is the layer of bumps. As long as the label is still smooth to the touch, the food is still OK to eat. The Washington Post reports:

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