Whether you’re a new mother or an experienced mom, having extra breastmilk bottles on hand to meet your growing and changing milk supply is critical. To ensure you have safe and convenient breastmilk containers and bottles, Medela offers this six pack of non-BPA and dishwasher-safe breastmilk containers. Medela’s Breast Milk Collection and Storage Bottle Set is a perfect complement to your breastfeeding experience. They are compatible with all Medela breast pumps and Calma, making it easy to pump, store and feed your baby from the same container. They are ideal for safe storage in refrigerators and freezers due to the high-quality plastic construction.These Medela breastmilk bottles retain all of the nutrients and beneficial properties that natural breastmilk provides for your growing baby. We’ve also made measuring the amount of milk you’re pumping simple with colorful ounce and millimeter markers. These bottles are dishwasher safe, which allows mothers and other family members to conveniently wash the bottles. These breastmilk bottles also include (6) screw-on lids that are leak-proof for safe storage, travel, and freezing.This kit contains (6) 5 oz./150 mL. bottles, (6) solid lids, and (1) Quick Clean Micro-Steam Bag. Medela’s primary focus is on helping moms to successfully breastfeed their babies for as long as they choose. Meeting this goal responsibly is at the heart of everything we do. The bottles also feature screw-on lids so that they do not leak when they are stored in the fridge or freezer, or transported when you are traveling.