“The water and Coca-Cola syrup are pre-chilled before entering our fountain dispensers with the ratio of syrup set up to allow for ice to melt,” McDonald’s explains via their website. “We also keep our fountain beverage system cold so your drink can always be at the peak of refreshing. There’s also our straw – it’s slightly wider than a typical straw, so all that Coke taste can hit all your taste buds,” they continued.

So there you have it! The reason why McDonald’s Coke tastes so much better than Coke elsewhere is simply due to things like proper storage, temperature, and even straw size. Although you don’t want to be drinking Coke every single day, you can rest assured that your occasional McDonald’s Coke hasn’t been spiked with any additives or suspicious ingredients.