This McDonald's McShake is an Unusual Purple Sweet Potato Milkshake

 - Sep 8, 2014
References: & en.rocketnews24
The color purple isn't an unusual one for milkshakes and smoothies, but this McDonald's Purple Sweet Potato Milkshake gets its color from a root vegetable rather than blended blueberries.

The unusual purple milkshake flavor is being introduced to McDonald's Japan for a limited time for the fall, making use of a fall vegetable in an unconventional way. The Purple Sweet Potato McShake combines the purple yam with a creamy vanilla, so that the beverage is sweet rather than savory. If you are one who has trouble downing vegetables on a regular basis, this could be one refreshing way to quench your thirst and dig in to something that you might only eat for lunch or dinner, while on the go.