The Correct Way to Sterilize Glass vs. Plastic Bottles

Always disassemble all bottle parts including nipples, caps, and rings, then rinse under running warm or cold water. Wash thoroughly with hot soapy water using a bottle brush to remove milk residue, grease, and dirt, especially squeezing soapy water through teat holes. Use mild, fragrance-free dish soap to avoid irritating baby's sensitive system. Rinse well multiple times.[1][2][3][5]

Fill a large pot with enough water to submerge all disassembled, pre-washed bottle parts. Bring to a full rolling boil and boil for at least 5 minutes. Use clean tongs to remove items and place on a clean dry towel or rack to air dry. Suitable for glass bottles; check plastic for heat tolerance as it may warp.[1][2][4]

Load pre-washed, disassembled bottle parts into a steam sterilizer, ensuring steam can circulate freely. Add required water to the reservoir, close the lid, and run the cycle per manufacturer instructions, typically 5-10 minutes. Steam uses high temperatures to kill bacteria effectively on mixed materials like plastic and glass.[1][4]

Thorough cleaning with hot soapy water and a brush after every use is essential to remove residue and most germs. Frequent sterilization is unnecessary for healthy full-term babies but recommended for newborns, preemies, or in areas with poor water quality. Dishwasher sanitizing cycles can suffice if available.[2][3][4]

Use mild, fragrance-free dish soap for initial cleaning to prevent residue that could harm baby's sensitive digestive system. Avoid harsh detergents or scented soaps. Hot soapy water with a dedicated bottle brush effectively removes milk fats and dirt before rinsing and sterilizing.[1][2][5]

Yes, for dishwasher-safe bottles: separate parts, place on top rack or in a closed mesh basket for small items, and run with hot water and heated drying or sanitizing cycle. This kills most germs effectively. Always pre-rinse and clean the brush and basin too.[3][4]

Chemical method involves soaking pre-washed parts in a solution of sterilizing tablets or liquid (e.g., 2 tsp unscented bleach per gallon water for 2 minutes). Pros include convenience for travel, no equipment needed, and sterility maintained up to 24 hours. Rinse thoroughly with cooled boiled water after.[1][3]

Microwave: Place pre-washed parts in a microwave-safe bag/container with water, heat on high for 3-8 minutes per instructions, cool before handling. UV: Arrange parts in device, run 5-10 minute cycle using ultraviolet light to kill bacteria without chemicals. Both are quick for mixed materials.[1][4]