If you have decided to bottle feed your baby, cool formula won’t hurt your baby. Most parents want to warm formula to body temperature. Don’t heat bottles in a microwave oven. The bottle may feel cool on the outside but still have hot spots inside that could burn your baby’s tender mouth. Heat the bottle in a pan of warm water off the burner, or hold it under hot tap water for a minute. Shake the bottle well to mix the formula. Test the temperature by sprinkling some on the back of our hand. If it feels lukewarm, it’s O.K. for the baby.

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