Cocoa combo box like Safari

Using Cocoa, I'd like to create a "combo box" as seen in Safari - think "select your state" where you click it, it drops down and has every option listed, and you choose them. This differs from the stan开发者_运维问答dard NSComboBox because it doesn't have a blank line in it. And it's also not so totally ugly..

Like an NSPopUpButton?