ELI5 mode
A reclosable closure mechanism featuring two complementary interlocking plastic ridges along the top edge of a flexible pouch or bag, which snap together when pressed to create an airtight seal. Trademarked by S.C. Johnson under the Ziploc brand since 1968, it revolutionized food storage by replacing unreliable twists and clips with a simple, intuitive zip action. Today, the design influences countless generic versions in household, medical, and industrial packaging.
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