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.

Why do so many consumers hate tethered bottle caps? Despite their role in ensuring that plastic lids can be recycled properly ...

However, some soda connoisseurs have noticed new Coca Cola bottles topped with yellow caps recently. This begs the question, is Coca Cola planning on ditching its century-old red and white branding?

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.