Skip to main content

How long is formula good for? This is when to toss it

When should you throw it out, even if you don't want to

Mother feeding her baby a bottle.
Ariel Skelley / Getty Images

Everything seems to be expensive these days, including baby formula. It can be tempting to stock up on your favorite brand if it goes on sale, but you have to be mindful of the “use by” date on the packages. It can also feel like you’re dumping money down the drain if you prepare a bottle for your babe and they only drink a small amount before they fall asleep or have no interest in drinking more. Whether it’s prepared or not, here’s how long formula is good for and when to know if you should toss it or not.

Unprepared formula

Mom looking at bottle to see if baby drank enough
Miljan Zivkovic / Shutterstock

It’s important to check the “use by” dates on all formulas you purchase and ensure you don’t use it after that date. Parents who supplement with formula may not use it a lot, so it’s important they know just how old their formula is. The CDC recommends using the formula within a month of opening the container.

We all know that as parents, you can get busy and may not always remember when you opened a container, so consider writing the date on the plastic lid with a marker to make it easier to keep track. Those of you who regularly formula feed are probably not worrying about having a container last longer than a month unless you keep extra supplies at places like grandparents’ houses or childcare providers. It’s important to keep track of use-by dates for all formula your baby drinks. You should also store the opened formula in a cool, dry place.

Prepared formula

Dad feeding his newborn with a bottle.
Anna Kraynova / Shutterstock

It can be frustrating to prepare your baby’s formula only to have them fall asleep or seem completely uninterested in eating. So what do you do with the bottle you’ve just made or if you’re using prepared infant formula? The CDC advises using any prepared infant formula within 2 hours of getting the bottle ready and 1 hour from when your baby starts eating, the CDC advises.

If your baby doesn’t drink from the bottle within those two hours, you can put that bottle in the fridge for up to 24 hours. However, if your baby starts drinking from the bottle but doesn’t finish, you should throw out any formula that remains within an hour. Because your baby has already drank from that bottle, they could introduce bacteria to the bottle. If you’ve heated a bottle for your baby to drink, you should use that bottle within an hour of it being heated, because a warm environment is also conducive to having bacteria grow.

It can be confusing trying to keep track of everything when it comes to feeding your baby, but once they have a routine, it will be easier to minimize waste and know just how much your baby wants to eat. You can always start by preparing smaller amounts and adding more if you’re worried about wasting expensive formula. Just remember these guidelines are here to keep your baby happy and healthy.

Editors' Recommendations

Kelli Catana
Contributor
Kelli is a freelance writer who has covered the world of entertainment, pop culture, parenting, and lifestyle for various…
When babies get their first haircut: Everything you need to know to get through this milestone without tears
Here's when babies should get their new look
Baby getting a haircut.

The first year of your child's life is filled with exciting milestone moments, like their first smile, learning how to crawl, and taking their first step. For most parents, that first snip of hair is another milestone that is just as celebratory and emotional. The notion of cutting your baby's hair for the first time could bring parents and baby to tears.

Whether you choose to trim your baby's hair yourself or take them to a trusted professional, you may wonder when baby gets their first haircut. If you think your little one is ready for their first styling, we have tricks and tips to help make the experience enjoyable for everyone — with limited tears involved.

Read more
When can babies have water? You might be surprised
Here's why you need to wait to introduce water to your infant
Mom holding a cup while baby drinks from it

Water is a crucial part of almost every living being's diet, with proper hydration being one of the keys to good health and wellness. However, you may be surprised to learn that there is an age limit when babies can have water.

Although it may be tempting on those hot summer days to give your infant a bit of water, or you may want to supplement your regular feeding schedule with water if you think your baby is thirsty, experts warn against giving water to infants under a certain age. So, when can babies have water? Keep reading to find out.

Read more
What is 4-month sleep regression (and how to keep it from ruining your life)
Here's what you need to know if you're dealing with 4-month sleep regression
A mother watching her baby sleep in their crib.

A good night's sleep is hard to get when you have a baby. So, when your little one starts sleeping for longer stretches, and dare we say through the night, it is a cause for concern. Not many parents may have heard of 4-month sleep regression, even though they may be experiencing it. Four-month sleep regression is perfectly normal and happens to some little ones around the 3- to 4-month mark. Of course, when baby isn't sleeping, neither is anyone else in the house. Here's everything you need to know about 4-month sleep regression, including when your baby will start going down for the night once again.

A guide to 4-month sleep regression
By the time babies are 2 to 3 months old, they typically sleep for 5 or 6 hours stretches. By 4 months, babies can sleep through the night without being fed. Whether a baby does depends on the child. Most babies will sleep for that heavenly stretch of 7 to 8 hours by the 4-month mark. If your kiddo has been snoozing for a solid 8 hours at night and has suddenly stopped, you could be dealing with 4-month sleep regression.
What is 4-month sleep regression?
When babies around the age of 3 to 4 months start having trouble sleeping through the night again, it could be a sleep regression period. Regression means to revert or go back to a previous pattern. This is what happens with sleep regression. Babies begin to have trouble falling or staying asleep at night and during their usual naptimes, regressing to those short intervals of slumber you thought had gone by the wayside.
When can 4-month sleep regression occur?
Despite the name, 4-month sleep regression can happen at any time. This change in sleep pattern typically happens to babies at around the 3- to 4-month mark.
How long does 4-month sleep regression last?
It may seem like ages, but 4-month sleep regression doesn't usually hang around for long. Provided parents make an effort to keep baby's sleep routine consistent, 4-month sleep regression lingers for around two weeks.
What causes 4-month sleep regression?
Since most parents want to avoid any interruption in the much-needed good night's sleep in the household, it's important to understand why this sleep regression happens in the first place to babies happily sleeping through the night. As infants, babies don't have a sleep and a wake cycle. They pretty much sleep when they want and wake when they're hungry or need a diaper change. When babies reach the 4-month mark, they begin to understand the sleep/wake cycle. They snooze longer at night and take fewer naps during the daytime. It's this important developmental adjustment that can actually interrupt their newfound sleep pattern.

Read more