Chick-fil-A is known for their fried chicken, dipping sauces, and waffle fries, but their drink options have a cult following, too. Their Frozen Lemonade is the stuff is of legend, and fans flock to the chain every winter for their Peppermint Chocolate Chip shake. And now, there's another drink that could be permanently added to the Chick-fil-A menu. The new drink that's being tested is called the Frosted Key Lime, and it's based on the pie of the same name.