The color red has become synonymous with Coca-Cola — so why are loyal customers seeing bottles with a yellow cap in the spring? The yellow top indicates that the bottle is kosher for Passover ...

Today, bottles of Coca-Cola that are kosher for Passover have yellow caps instead of the traditional red ones. In addition to the yellow cap, the bottle has a Passover certification symbol.

If you've perused the beverage aisle of your local supermarket lately, you may have noticed that some soda bottles are sporting yellow caps instead ... like corn. Coca-Cola is certified kosher ...

This image from Coca-Cola's filling line gives a clear view of the plastic cap still in use "We have a good understanding already of what the bottle will go through as we put it into the real world.