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McDonald's redesigns straw for new Shamrock Shake flavor

February 15, 2017 05:34 PM

A team of engineers at McDonald's has created a new straw, to help people better enjoy its new version of the Shamrock Shake.

The new Chocolate Shamrock Shake, which was released this month, contains a layer of chocolate milkshake under a layer of the traditional Shamrock Shake. In order to make sure customers were able to get a taste of mint and chocolate in one sip, McDonald's hired a team of aerospace engineers to figure out how to redesign the straw.

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The new straw, titled "Suction Tube for Reverse Axial Withdrawal" or STRAW, is curved into the shape of a "U" at the bottom. The U-shape allows it to pull in flavors from both ends of the drink.

"It was a puzzling assignment but one with an ambitious goal," said Seth Newburg, principal engineer and managing partner at NK Labs. "From a physics perspective, it’s actually quite difficult to deliver a proportional amount of both chocolate and mint flavors with each sip. But that’s exactly what we did. It’s a marvel of fluid dynamics. Thanks Fibonacci sequence."

McDonald's only produced a small number of the straws in time for Shamrock season, so it will only be available at select locations -- meaning it's unlikely you will get a chance to try it out. The restaurant says it will post the locations for the straw on its website.

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