Breastmilk Storage Bottles (Standard-Neck). 6 Pc, 5oz/150ml. Breastmilk Collection Bottles. With One-piece Standard Bottle Cap. Replace Medela Bottles, Ameda Bottles, Dr Brown's Storage bottles. Can Be Connected with Medela Pump in Style, Freestyle, Swing, Harmony, Lactina, Mini Electric, Symphony, and Ameda Purely Yours Breastpumps. Bottle Cap Can Be Used with Medela Bottles and Dr Brown's Standard Neck Bottles. (5oz/150ml - 6pc)