How to prepare a baby bottle safely
To prepare a formula bottle safely, wash your hands and use a clean bottle, pour in the water first, then add the exact number of level scoops the label says, using only the scoop in that can. Never add extra water to stretch formula. Warm it in a bowl of warm water, not the microwave, test a few drops on your wrist, and throw away what is left after the feed.
About 15 minutes to learnSafety critical: tightly scoped, know when to call a professional
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How to do it
- Wash your hands and use a bottle, nipple and ring that were washed in hot soapy water and rinsed.
- Ask your pediatrician which water to use for mixing, and whether it needs boiling and cooling for your baby's age.
- Pour the amount of water the label says into the bottle first.
- Add the exact number of scoops the label says, leveling each with the can's leveler, using only the scoop from that can.
- Cap the bottle and shake until the powder is fully mixed.
- If the baby likes it warm, stand the bottle in a bowl of warm water; never microwave it.
- Shake a few drops onto the inside of your wrist: it should feel lukewarm, not hot.
- 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
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Teach this to someone
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Teach: How to prepare a baby bottle safely
What to say
To prepare a formula bottle safely, wash your hands and use a clean bottle, pour in the water first, then add the exact number of level scoops the label says, using only the scoop in that can. Never add extra water to stretch formula. Warm it in a bowl of warm water, not the microwave, test a few drops on your wrist, and throw away what is left after the feed.
What to show, in order
- Wash your hands and use a bottle, nipple and ring that were washed in hot soapy water and rinsed.
- Ask your pediatrician which water to use for mixing, and whether it needs boiling and cooling for your baby's age.
- Pour the amount of water the label says into the bottle first.
- Add the exact number of scoops the label says, leveling each with the can's leveler, using only the scoop from that can.
- Cap the bottle and shake until the powder is fully mixed.
- If the baby likes it warm, stand the bottle in a bowl of warm water; never microwave it.
- Shake a few drops onto the inside of your wrist: it should feel lukewarm, not hot.
- Throw away any formula left in the bottle after the feed, and refrigerate made-up bottles only as the label allows.
When to stop and call a professional
- 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.
The check question
Ask: What goes into the bottle first?
Related skills
- How to change a diaper
- How to settle a crying baby
- How to support a partner after birth
- Every skill in Dad and Family
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 .