Our most breast-like bottle, ever. Makes switching from breast to bottle and back again, easy. Soft, silicone nipple, that flexes and stretches like a breast Anti-colic valve, to keep gas away from baby’s tummy Speedy self-sterilizing, in just three minutes in the microwave 100% leakproof with the lid (even when upside down) BPA free What’s included: 2 x 5oz Natural Start baby bottles, 3 x 9oz Natural Start baby bottles, 1 x 11oz Thicker Feed Natural Start baby bottle, 2 x medium-flow nipples, removable bottle handles, bottle & nipple brush, 3 x bottle travel lids