Medela breast milk storage/ collection bottle sealed with lid 8 oz/ 250 ml. Bottles are Micro-steamable with Medela Quick Clean Micro-Steam Bags (sold separately). Bottles can withstand boiling temperature to clean Material Of Construction. All parts that come into contact with breast milk are BPA/DEHP Free - Special food contact grade (conforms to FDA standards) polypropylene material - BISPHENOL-A (BPA Free).