One of the most recent theories has been brought to light by The New York Times. Apparently, storing Coke syrup in stainless steel containers keeps it better preserved than the methods preferred by other competitors.
McDonald's official website confirms that the fast food giant follows strict guidelines set by Coca-Cola to ensure it tastes the same as when you buy it in a bottle.
Insulated tubing is run from the back refrigeration unit all the way to the front and drive-through units. That means the tastes can vary from one city block to another. It gets them cooler, sure, but not cold. They also pre-chill the water—more on that to come. Most restaurants leave the syrup sitting in the plastic bags in a hallway or under a soda fountain.
Good Subscriber Account active since Shortcuts. Account icon An icon in the shape of a person's head and shoulders. It often indicates a user profile. Log out. US Markets Loading H M S In the news. Stella Kleynerman , Spoon University. Sign up for notifications from Insider! Stay up to date with what you want to know. That means your first sip of McDonald's Coke is going to be a little sweeter than your fifth, but the drop-off is designed to be as subtle and slight as possible.
As a side note, ordering Coke with no ice at a McDonald's is a big no-no. It's literally designed to be served with ice, so the flavor is really different without it. To slow down the dilution of flavor caused by melting ice, McDonald's pre-chills its syrup before it's mixed into your drink. This is critical not only to prevent dilution but also to keep the soda carbonated longer.
Carbonation decreases rapidly at higher temperatures, so your drink becomes less carbonated the warmer it gets. Not every restaurant pre-chills its syrup. In fact, the majority of fountain drink machines use a flash-chilling system that is much less efficient than McDonald's pre-chilling method.
To go the extra mile, McDonald's even pre-chills the water that goes into the Coke. In order to keep its ingredients as chilled as possible, McDonald's has developed its own system of transporting, storing, and dispensing Coca-Cola. A big part of this process is making sure the syrup does not spoil before it makes its way to the customer - and McDonald's has implemented some clever solutions to avoid this problem.
While most restaurants store their syrup in plastic bags as pictured here , McDonald's uses special steel storage tanks designed to keep their contents cool. Syrup in plastic bags is much more vulnerable to the elements, and bags left in the open air can warm up over time. McDonald's steel tanks protect the syrup from temperature changes, as well as air and light exposure. This allows for flavor consistency across the chain's many locations.
When it comes to Coke, McDonald's spares no expense in making sure all of its ingredients are as fresh as possible. Everything is pre-chilled before the soda is mixed, including the water and the actual drink fountain itself. The entire fountain beverage system at McDonald's is kept at a chilled temperature thanks to insulated tubing.
The tubes connect the restaurant's fountain machines to a refrigeration unit in the back, and water is continuously pumped through the system in order to keep it in the range of 33 to 38 degrees Fahrenheit.
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