BuzzFeed Food reached out to Starbucks for comment and they had tips for ordering:

"If a customer would like to order a beverage that is not listed on our menu boards, we recommend they know the recipe so that their barista can handcraft the beverage perfectly for them," a Starbucks spokesperson told BuzzFeed Food. "For example, while we don’t offer an official Matcha Pink Drink, the green and pink layered beverage, if a customer would like to order this beverage, the easiest way is to ask for a Strawberry Acai Refresher with coconut milk instead of water, and layer it over coconut milk and matcha."