This Iconic Red Cup Has a Secret Feature

If you’re attending a backyard barbecue, pool party, or any kind of group gathering, chances are someone’s going to offer you a beverage in a red Solo cup (or its off-brand ilk). Long before it was immortalized in song, the disposable, recyclable, and brightly colored plastic cup has been a de facto accompaniment to good times in the good old U.S. of A.

Here’s why it’s so iconic — including a secret that you may not know.

Although the Solo Cup Company has been making paper cups since 1936, it wasn’t until the 1970s — the decade of Animal House andDazed and Confused — that the plastic version was first released and immediately adored by collegians, campers, and backyard burger-flippers alike.

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