MCDONALD'S HAS RE-DESIGNED THE STRAW--SO YOU CAN ENJOY A CHOCOLATE SHAMROCK SHAKE

posted by Mark Robertson - 

Of all the tech innovations coming out of McDonald’s, we never would have expected the humble drinking straw needed a redesign. But that’s exactly what a team of robotic and aerospace engineers did as part of a marketing push for the burger chain’s new Chocolate Shamrock Shake. The redesigned STRAW — short for “Suction Tube for Reverse Axial Withdrawal” — is meant to alleviate the most basic of problems: having to wait for your shake to melt a bit before you can get the perfect mix of chocolate and mint flavors. While a conventional straw will only slurp up one part of the shake at a time, engineers carefully engineered the STRAW’s J-shaped snorkel design and side openings to suck in both layers at once. According to McDonald’s, their new tubular sipping device required some fairly complex computational fluid dynamics simulations to get the flow right and make sure it works just as well at the bottom of your shake as it did on the first sip.

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