Why do McDonald's Cups have Four Bumps on Them? Ever wondered what the bumps on McDonald's cup lids are for? They're the secret code for your drink!————————————————————————————————————————, Welcome to the intriguing world of Dr. Red Panda! Consider subscribing to Dr. Red Panda, and make science much more engaging! Through simple and accessible explanations, we'll guide you into the world of knowledge, to shape you into the most shining leader among people! While you're enjoying the content, don't forget to subscribe! # #trivia #McDonald
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