If you are introducing your baby to the bottle for the first time, look for a nipple that has flow control and a more natural shape. (myorganicformula.com)
He also evokes the origins of photography as a chemical process, as if art, like a soap bubble, could find its own natural shape. (haberarts.com)
And that is a good thing to look for if your babies tend to have an irregular natural shape. (testfacts.com)