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!

Why there are buttons on McDonald's drink lids - Daily Star

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

McDonald's workers share what the 'buttons' on its drink lids really mean

McDonald's workers share what the 'buttons' on its drink lids really mean

Someone Just Showed What Those Rectangular Buttons On Drink Lids Are For—And We Had No Clue

What are those 'buttons' on top of McDonald's drink cups all about? - Wales Online

What are the pop up buttons for on your plastic cup lids that you get at fast food restaurants? - Quora

Why the McDonald's drink lids have the buttons pushed down - 9Kitchen

What do the labels/writing on the McDonald's lids mean? - Quora