Why do some Coca-Cola bottles have yellow caps? | consumer psychology | Scoop.it

"Once a year, Coca-Cola releases bottles topped with yellow caps to signify that the product is Kosher for Passover. That means instead of using high-fructose corn syrup, which is forbidden for those who observe, the brand uses real cane sugar — essentially mimicking the formulation for the much-prized Mexican Coke ..."