Orange and Peach Breastmilk Storage Bottles are a convenient and environmentally friendly way to store your expressed or pumped breastmilk in the refrigerator or freezer. Each box contains 4 bottles with 5 oz. capacity per bottle. The bottles also come with spill proof silicone discs to ensure that your breastmilk is stored safe and hygienic. These wide neck bottles are made of BPA and Phthalates Free plastic. It can be sterilized and washed with hot water. The screw rings are also replaceable with Avent wide neck bottles and teats. It has the following features: BPA and Phthalates Free plastic, Reusable, Refrigerator and freezer safe, Can be used alternatively as baby bottle, Contains 4 bottles, 4 screw caps, and 4 silicone leak proof discs, 5 oz. capacity per bottle