5. Measure the formula

Carefully measure the amount of water and formula following the instructions on the product label. Too much water might mean your baby doesn't get enough nutrients. Too little water might cause your baby to have digestive problems or not have enough fluids.

• Pour enough formula for one feeding into a clean bottle.
• Use only formula — don't add water or any other liquid.
• Attach the nipple and cap to the bottle.

• Pour the amount of water needed into a clean bottle.
• Pour the amount of formula needed into the bottle.
• Attach the nipple and cap to the bottle and shake well.

• Determine the amount of formula you want to prepare, following the instructions on the product label.
• Measure the amount of water needed and add it to a clean bottle.
• Use the scoop that came with the formula container to scoop the powdered formula. Add the number of scoops needed into the bottle.
• Attach the nipple and cap to the bottle and shake well.

If your baby is younger than 2 months, was born prematurely or has a weakened immune system, some extra steps can lower the risk from cronobacter bacteria:

• Boil water.
• Measure the water after boiling.
• Let cool for five minutes.
• Prepare the formula.
• Put the baby's bottle under cold running water or in an ice bath to cool. The formula should be at body temperature, 98.6 degrees Fahrenheit (37 degrees Celsius).
• Test that the formula is lukewarm — not hot — by putting drops on your wrist or the back of your hand.