A Jewish Holiday
The change was made for the people who celebrate Passover. During the yearly Jewish holiday, corn syrup, along with some other food items, is off the table. However, sucrose isn’t off-limits, which means it is still possible for folks who are observing Passover to enjoy a Coke—just the kind that comes from a yellow-capped bottle. It seems like the drinks giant really wants to make Coke a drink you can enjoy all year-round.
Kosher
The special caps basically tell you that “this drink is kosher during Passover.” The Hebrew term Kosher means “fit, proper or correct” in terms of products which line up with the Jewish standards of food and beverages. Simply put, it is a seal of approval. If something is not kosher, it is not allowed during Passover. The holiday is celebrated usually in spring for around a week, and there are other customs that are observed.