Full ChapStick Duo. 8 hour moisture. Snap! Change. Rearrange. New! New ChapStick Duo has varieties that you can mix and match to make your favorite combination! ChapStick Duo provides up to 8 hours of long lasting moisture for healthier looking lips. Other Information: Store at 68-77 degrees F (20-25 degrees C). For most recent production information, visit www.chapstick.com.