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Instructions for a Munchkin Microwave Sterilizer

By Michelle Blessing ; Updated April 18, 2017

Germs are just one of the things that parents tend to worry about. While exposure to germs can help increase your baby's immunity to disease, it is still important to protect your baby from germs. The Muchkin microwave sterilizer allows you to use a common household appliance to super-clean your baby's most used item in those first months: the bottle.

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Wash all bottle parts in soapy water and rinse in clean water prior to placing in the Munchkin Microwave Sterilizer.

Remove the bottle/accessory rack from the base of the sterilizer. Fill the base with 7 fluid ounces of water. Replace the rack on the sterilizer base.

Place up to four wide-mouth bottles on the crescent-shaped holders located by the central stem of the rack. Place bottle nipples around the edge of the sterilizer. Place nipple locking rings behind the bottles.

Place up to four standard-size bottles on the rack's arrow-shaped notches at an angle. The bottles will stay in place when properly inserted. Place bottle nipples inside the crescent-shaped holders. Place nipple locking rings behind the nipples.

Place your breast pump shield on the arrow-shaped notch in the tray. Arrange any other breast pump accessories around the shield in the tray.

Replace the lid of the Munchkin microwave sterilizer on the base and clip into place using the side latches.

Place the sterilizer in the microwave and set the timer for your microwave oven wattage. For 500 to 800 watts, use six minutes. For 850 to 1000 watts, use four minutes. For 1100 to 1850 watts, use two minutes.

Allow the sterilizer and bottle/breast pump components to cool for at least two minutes before removing from the microwave oven.

Unlatch the lid and remove the sterilized bottles or breast pump parts using tongs. Drain any excess water from the sterilizer.

Clean the Munchkin microwave sterilizer parts in hot, soapy water or on the top rack of your dishwasher after several uses.

Things You Will Need

  • Water
  • Bottles
  • Nipples
  • Breast pump accessories
  • Microwave
  • Tongs


Use the appropriate amount of water (7 fluid ounces) to prevent damage to the sterilizer or bottle/breast pump parts. Sterilize other feeding items, such as spoons and forks, by placing them in the accessories rack and following the above instructions. Follow the correct times for your microwave's wattage to prevent damage. Use distilled water to prevent mineral deposits.


Remove the unit carefully from the microwave oven to prevent steam burns. Do not use the microwave to sterilize any metal objects.

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About the Author

Michelle Blessing has experience in child development, parenting, social relationships and mental health, enhanced by her work as a clinical therapist and parent educator. Blessing's work has appeared in various online publications. She holds a Bachelor of Arts in sociology from Bloomsburg University of Pennsylvania and is pursuing her master's degree in psychology with a specialization in applied behavior analysis.

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