How to Sterilize Baby Bottles in Microwave?

There are many ways to clean the bottles your baby uses, whether you do it on the stove, in the dishwasher, hand wash, electric sterilizer, or microwave. Yes, you can sterilize baby bottles in the microwave, but that’s still not a way you should heat your baby’s bottles!


Using a microwave sterilizer is easy and convenient to use. They are easy to take with you if you travel, effortless way to sterilize, and it’s quick! Let me show you how to sterilize baby bottles in microwave!

Tools of the Trade

Before we get started with the procedure, you will need a couple of items. You need the equipment, liquid, and the items to be cleaned!

Microwave Sterilizer

You can use any microwave-safe sterilizer you want, but I love the Philips Avent Sterilizer. It holds four bottles, nipples, bottle rings, and breast pump guards. I have even used this to clean teething toys, pacifiers, and other things I think need to be cleaned.



Any sterilizer you want will be fine to use you just make sure it fits your needs. A 4-bottle sterilizer will not be enough if you have twins, triplets, or so much more!


Baby bottles are essential to have since that is what we will be sterilizing! I prefer to use baby bottles that help with colic and increase digestion since my kids have stomach issues. For this reason, I use the Philips Avent Anti-Colic bottles; these bottles are easy to use, hold, and clean.

Most bottles will fit in the steamers, but be sure to check that your bottles are supported with your steamer. Some are made smaller and won’t fit larger bottles.


You will need water to add to the bottom of the sterilizer to create steam. Without water, no sterilization can take place, and you will not have any clean bottles, sadly.

Tap water is fine to use, I use it, and many other parents do too. If something is wrong with the water in your area or you don’t want to risk it, you can always use the reverse-osmosis water if you have it or bottled water is fine too.


While this may only take a few minutes to sterilize the bottles, you will need to get the sterilizer ready, remove it from the microwave, place the bottles on a drying rack or dry them, and clean the sterilizer. This process will require a small amount of time and depends on how many bottles you need to sterilize.

Sterilizing Using the Microwave

Before we start the process, it is important to know that microwave sterilization is perfectly fine to do with bottles that are BPA free. It doesn’t matter how you clean them, rather than the safety of BPA leaching into the bottles when heating formula.

Step 1: Wash Up

First, you should wash your hands and the bottles. You need to be clean if you are touching the inside of the sterilizer, and you need to wash your hands again when you remove the bottles to prevent contamination.

The bottles need to be cleaned; otherwise, you are sterilizing food, which is not clean. This can also affect the sterilization process in the future.

Step 2: Fill the Base

Fill the sterilizer base with water according to the instructions in your manual. You don’t want to overfill or underfill; you need the proper amount to sterilize your bottles correctly.

Try using a small measuring cup to add the water to the base to make sure the correct amount is added to the sterilizer.

Step 3: Place the Bottles

Position the bottles, upside down, and the nipples and bottle rings around the sterilizer ring and close the lid, making sure it’s securely locked into place.

This is important because if the lid is not locked into place, the sterilizer can leak hot water on you when you remove it from the microwave. Please be careful!

Step 4: Microwave

Depending on what your manual instructs you to do, the time will be between 2 to 4 minutes of microwaving. This is to make the water boil which will create steam and sterilize the bottles using the steam.

Philips AVENT Microwave Steam Sterilizer

The time may also vary depending on the microwave you have, the type of sterilizer, and the number of bottles your sterilizer holds.

Step 5: Air Dry

During the microwaving, clean the drying rack and dry it off with a clean towel. Allow the bottles to air dry on the rack until thoroughly dry.

When removing the sterilizer from the microwave, please take caution. Some sterilizers have leaked, and the hot water can cause damage to your skin.

Clean Baby Bottles

Now you know how to use a microwave sterilizer, and it’s so easy to do! You can find microwave sterilizers in all baby stores as well as online, and they come recommended by physicians. It’s best to sterilize your baby’s bottles at least once a week, and every time you buy new ones.

Have you used a sterilizer before? What do you think about sterilizers? What is your favorite method of sterilizing baby bottles?


My name is Shirley. I’ve blogged about babies and parenting for a bit over two years, and with being a mother myself, I understand the needs and concerns you have for your children’s safety as well. It’s important. I hope you enjoy your stay with us

Click Here to Leave a Comment Below 1 comments
Lianna - November 8, 2017

Baby bottle sterilizer guideline is very good. I love your information and tips. Bottle sterilizing using Microwave that’s very easy.



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