For Baby's First 12 Months. Makes 103 fl oz. Easy to digest. Experts agree on the many benefits of breast milk. If you decide to use infant formula, you should know that the maker of Enfamil is dedicated to making its line of formulas as close as possible to breast milk - our Gold Standard. Enfamil A.R. was specially designed for babies who spit up frequently or whose doctor recommends a thickened formula. Use as directed by you baby's doctor. Ask your doctor which of the Enfamil formulas is best for your baby.