If you're a Coca-Cola fan, you may have spotted a few special bottles every spring that sport a yellow bottle cap instead of ...

and the bright red logo is easily recognized the whole world over. So, when that classic look changes, you notice it right away. In fact, you've probably noticed yellow cap Coke bottles recently ...

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.