The Mother’s Milkmate System allows you to pump and freeze from the same bottle! The bottles are compatible with most standard pump systems including Medela ®, and come with removable freezer grade labels for freshness dating. The bottles are easy to clean, top rack dishwasher safe and may be used in the refrigerator or freezer. Graduation marks show how much milk has been stored. The “First In/First Out Breastmilk Storage Rack™” keeps the freshest bottle at hand!  Comes with the rack and 12 bottles with lids.