holds the bottle correctly ensuring the proper flow of milk/formula and preventing air from entering, which can cause stomach discomfort works with ALL infant carseat handles including the ergonomically designed Evenflo handle works with ALL bottle sizes and types it's compact - perfect for diaper bags teaches babies how to hold the bottle returns to position for active infants promotes hand-eye coordination entertains the baby and can hold toys best of all - it is simple and easy to use! *The bebe bottle sling is NOT recommended for use in a moving vehicle. Adult supervision REQUIRED. As seen on the Dr Phil Television show and recommended by American Maternity Associations.