The top line of code on the bottle neck is the recommended use by date when Gatorade is at its optimal freshness and flavor versus an expiration date. Gatorade is a shelf stable product, not a perishable product like milk or juice. However, proper storage is essential to maintaining freshness for the longest period of time. Always store Gatorade in a clean, dry and cool location. Improper storage, such as exposure to high temperatures, direct sunlight, humidity, etc., may reduce the recommended shelf life of any product.