To prepare Bobbie formula, add one unpacked, level scoop of powder for every 2 fl. oz. of warm water. Always add water first, then powder, and shake to mix thoroughly.

Tap Water

✅ Usually perfectly fine

✅ Convenient and economical

❓ Ask your pediatrician or local health department if you have concerns

Bottled Water

✅ Can be a good backup option

❓ Check expiration dates (yes, water can expire!)

⚠️ Not all bottled waters are created equal—avoid mineral or sparkling varieties

Distilled or Purified Water

✅ Both are completely fine to use

✅ Ready to use without boiling

✅ Good option when traveling or if tap water quality is questionable

The Temperature Sweet Spot

For optimal formula reconstitution, warm water to 100°F (38°C). This temperature helps the formula dissolve properly and ensures all those nutrients mix perfectly. Not too hot, not too cold—just right for baby's belly and the formula's chemistry.

The Golden Rule

ALWAYS follow the mixing instructions on the formula container.

Formula is scientifically designed with specific water-to-powder ratios.

Check out this article for more details about choosing the best water for your baby.

You can store a freshly prepared and untouched bottle of Bobbie formula at room temperature for up to 2 hours or in the refrigerator for up to 24 hours. Once feeding from the bottle has begun, discard the bottle after 1 hour. Don’t refrigerate leftover formula to save it for later.

Bobbie baby formula that has been prepared but not yet offered to your baby can last in the refrigerator for up to 24 hours. You can prepare a batch of formula in bulk, up to a day's worth, and keep it in the fridge until you need it! Any powder formula that you have prepared with water should be kept in the fridge, in a sealed container, such as a formula mixing pitcher or in individual bottles, until ready to serve.

Unfortunately no, once a bottle of formula has been heated it must be used within 1 hour. If parents prefer to offer warm bottles, they should be heated immediately before each feeding using a bottle warmer or a mug of hot water– never the microwave! Given the shorter window for how long formula stays good after heating, many parents choose to offer their baby room temperature formula or even chilled formula straight from the fridge. That’s right! You do not need to heat your baby’s formula bottle before serving!

The amount of formula your baby needs will likely vary as they grow. The American Academy of Pediatrics recommends that infants consume approximately 24-32 ounces of formula or breastmilk per day during their first year.

If you're mostly breastfeeding and/or combo feeding your baby, your Bobbie journey will look different from what we've listed above. Breastmilk intake can vary substantially from formula intake due to the changing nutrient content of breastmilk as a baby ages. We recommend taking our Formulator Quiz to ensure you're selecting the Bobbie bundle size that's just right for your family.

The Temperature Sweet Spot

For optimal formula reconstitution, warm the water to 100°F (38°C). This temperature helps the formula dissolve properly and ensures all the nutrients mix perfectly. Not too hot, not too cold—just right for baby's belly and the formula's chemistry.

The amount of formula your baby needs will likely vary as they grow. The American Academy of Pediatrics recommends that infants consume approximately 24-32 ounces of formula or breastmilk per day during their first year.

If you're mostly breastfeeding and/or combo feeding your baby, your Bobbie journey will look different from what we've listed above. Breastmilk intake can vary substantially from formula intake due to the changing nutrient content of breastmilk as a baby ages. We recommend taking our Formulator Quiz to ensure you're selecting the Bobbie bundle size that's just right for your family.