This starter kit comes complete with 5 oz. and 8 oz. feeding bottles, so that parents may choose to use the size most suitable for baby. What it does: The breast milk storage lids also allow the feeding bottles to be easily converted to air-tight and secured storage containers by simply swapping the interchangeable lids. One container, different lids-minimal hassle with maximum convenience. Everything happens within a single container, minimising wastage and making every drop count.Set includes:1 x 8 oz. Feeding Bottle with Medium Flow Teat1 x 5 oz. Feeding Bottle with Slow Flow Teat2 x PCTO™ Breast Milk Storage Lids White2 x Seals Plastic/polypropylene/silicone Top-rack dishwasher safe Imported