Pack of six 9 ounce bottles with six size 0 nipples, six size 1 nipples, and 4 size 2 nipples. Gently used, all numbers and measure marks still visible and in perfect condition. Dishwasher safe. - Designed For Seamless Transition Between Bottle and Breast: Natural Start bottles have silicone nipples that are designed with an anti-colic valve and mimic the flexibility of a breast - Natural Latch For Baby: Our silicone bottle nipples are shaped to encourage a natural latch, reducing air intake and preventing nipple confusion when switching between breast, bottle and back again - 100% Leakproof Bottle to Avoid Messes: When the screw ring, nipple and cap are all secured, your baby bottle is completely mess-free and 100% leakproof, even if it’s turned upside down -Designed For Pace Feeding: The soft silicone nipple flexes and stretches like a breast and allows your baby to feed comfortably at their own pace and stop when full