Playtex Drop-Ins Original BPA Free Nurser Newborn Starter Set
This nurser starter set is appropriate for the mother who hasn't yet  figured out exactly what she and baby want. The five included bottles (two  4-ounce and three 8-ounce) are all of the disposable-liner type--an open-ended  plastic sleeve with ounce markings up the side. But the pack includes both  standard plastic-bag style disposable liners (in both sizes) and five each of  the Playtex Drops-Ins, which are semirigid and have their own lip at the top for  convenience. There are also four different kinds of nipple: infant, round, older  baby, and orthodontic. One of the 8-ounce sleeves has an "Eazy-Feed"  system--essentially, an inner ring that can be pushed up from the outside with  one thumb--that acts as a built-in burper.--Richard Farr