So when you see a Coca-Cola bottle with a yellow cap, it means the drink recipe includes real sugar, not corn syrup. The yellow top indicates that the bottle is kosher for Passover.

Yellow Caps. The first reporting we found about yellow caps on Coke bottles came from an April 2, 1998, article from The Record, a newspaper based in Hackensack, New Jersey.

Why this kosher-for-Passover Coke with the yellow cap is going viral The limited-time Coca-Cola product is made with cane sugar rather than high-fructose corn syrup. Some people can’t get enough.