Don’t heat baby’s bottle in the microwave. Microwave ovens heat unevenly, creating hot spots in liquids that can burn your baby’s mouth. You can make use of the microwave’s convenience by heating a mug of water in it and then warming the bottle in that mug for a minute or two. Or heat baby’s bottle to a lukewarm temperature under a warm tap. Check the temperature on your skin before offering it to your baby.
Feed your baby a cool or room temperature bottle if he seems to prefer it.
Sterilize new baby bottles and nipples in boiling water for five minutes. The nipples will change color, but they’re still fine to use. After that, simply wash bottles, nipples, and caps in the dishwasher. Or wash them by hand with a bottle and nipple brush in hot, soapy water and rinse very well.
Wash your hands with soap before preparing baby’s bottle.
Always keep prepared baby formula in the refrigerator until you need it. Read the instructions on the formula container to see how long it may be stored. Generally, a prepared bottle of powdered infant formula must be used within 24 hours, and a prepared bottle of liquid concentrate or ready-to-use formula within 48 hours.
Buy generic infant formulas if they’re more affordable for you. Name-brand and generic formulas made in the United States must both meet the same strict FDA guidelines for nutrition and safety.
Talk to your pediatrician if you're unsure which formula to use.