Here's Why Some McDonald's Cup Lids Have Rectangular Buttons

Frequent McDonald's customers may notice that McDonald's cup lids have rectangular buttons. Here's why the buttons exist!

People are only just realising what the secret buttons on McDonald's cups are for

McDonald's fans shocked to discover purpose of doodads on drink lids

People are only just realising what the secret buttons on McDonald's cups are for

McDonald's drink lids have 'buttons' on - but why, and what do they do? - Liverpool Echo

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Your McDonald's Cup Lid's Rectangular Buttons Actually Serve A Purpose - Yahoo Sport

Soda fans are shocked to discover purpose of doodads on drink lids – New York Post

People only just learned what the McDonald's drink lid buttons are for

Why McDonald's Lids Have Those Rectangle Buttons—Hint, the Answer Is Mind-Blowing

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