Have you ever noticed those zigzag patterns on the edges of some packages, like bags of chips or chocolate bars? It's clear that they're there to make it easier for you to tear the plastic. But why does it tear so easily? Food packaging has some other secrets: regardless of the brand, all chips have the Best Before date that ends on a Saturday. What other packaging tricks should you know to always buy the healthiest food?

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Why Chips Bags Have These Cuts + 19 Packaging Secrets