The Medela Bottle set includes: 3 bottles (5 oz.), 3 wide base, slow-flow silicone nipples, 3 collars, 3 solid lids, 3 travel caps bisphenol-a free. The safe plastic is designed for long-term breast milk storage retains breast milk's beneficial properties. The wide base, slow-flow silicone nipple complements breastfeeding. Colorful, easy to read volume marks in ounces and milliliters. The bottles are compatible with all Medela breast pumps. Just Pump, store and feed with the same bottle. Dishwasher and microwave safe. Product features ease and convenience for breastfeeding moms. Pump directly into the 5 oz. bottle and store. Bottles safely retain breast milk's beneficial properties. Compatible with all Medela breast pumps.