Medela Breastmilk Bottles are made without BPA, designed to retain breastmilk’s beneficial properties. Compatible with all Medela breastpumps, so you can pump, store and feed with one container. -Extra bottles are compatible with all Medela Breast pumps, as well as Calma -Ideal for safe storage of breastmilk in refrigerator or freezer -Measure the exact amount of milk you"re pumping with the colorful ounce and millimeter markers -Screw on lids for leak-proof storage, travel and freezing -Travel cap keeps nipple clean -Dishwasher & microwave safe -Available in 5 oz and 8 oz sizes -Includes: (3) 8 oz/250 mL bottles, (3) solid lids, (3) medium-flow silicone nipples, (3) wide base collars and travel caps