We finally know what those rectangular 'buttons' on McDonald's drink lids are used for. The Real Purpose Behind the McDonald’s Drink Buttons Has People Losing It Skip to main content ...

McDonald’s customers are just now discovering what the buttons and ridges on the top of the drink lids are for — and they’re lovin’ it. A video posted on the “Today Years Old” Twitter ...

McDonald’s lovers had their minds blown after seemingly learning the purpose behind the buttons on the top of drink lids.. This week, a video posted on the popular Twitter account Today Years ...

We finally know what those rectangular 'buttons' on McDonald's drink lids are used for. ... If a McDonald's worker were to accidentally press the wrong circular button and label the wrong beverage ...