Mark it once you can do it without this page open.

How to do it

  1. Wash your hands and use a bottle, nipple and ring that were washed in hot soapy water and rinsed.
  2. Ask your pediatrician which water to use for mixing, and whether it needs boiling and cooling for your baby's age.
  3. Pour the amount of water the label says into the bottle first.
  4. Add the exact number of scoops the label says, leveling each with the can's leveler, using only the scoop from that can.
  5. Cap the bottle and shake until the powder is fully mixed.
  6. If the baby likes it warm, stand the bottle in a bowl of warm water; never microwave it.
  7. Shake a few drops onto the inside of your wrist: it should feel lukewarm, not hot.
  8. Throw away any formula left in the bottle after the feed, and refrigerate made-up bottles only as the label allows.

Stop and call a professional if

  • Any question about your own baby's health, feeding or sleep: call your pediatrician's office or its after-hours line, which is there for exactly this.
  • You cannot find or afford formula: call your pediatrician or local health department for help; never dilute it or make your own.
  • A baby under three months has a fever, is vomiting forcefully, or has far fewer wet diapers than usual: call the doctor now.

Common mistakes

  • Adding extra water to make formula last longer, which can seriously harm a baby.
  • Heaping or packing the scoops.
  • Microwaving, which creates hot spots that can burn a mouth.
  • Saving a half-finished bottle for the next feed.
  • Making formula at home from other milks or recipes.

Quick self-check

Three questions. Your last score is kept in this browser.

1. What goes into the bottle first?
2. Why never add extra water to formula?
3. How should you warm a bottle?

Teach this to someone

A one-page sheet for showing a friend, a roommate or a kid: what to say, what to show, and one question to check it landed.

Sources

  • National pediatric guidance for parents, current edition. Checked September 28, 2026.
  • The formula's label and mixing instructions, per product. Checked September 28, 2026.

Last reviewed . First published .