My local homebrew shop has 187ml (6.3 oz) bottles that take either a cap or a cork. 28 dollars for 24 bottles, so just over a buck each. I don't usually give these away but they are great to try one every few months. I like to bottle as close to a 1 serving size as possible so I don't worry that some might go to waste, and 6 oz is about right for most my high abv homebrews.
Upcoming: Berry Melomel, Coffee Cream Stout, Plum Mead, Acerglyn.
Fermenting/Bulk Aging: Spiced Cyser, Grape Pyment, Sweet Mead.
Bottled: Maple Porter, Honey Red Ale, JAO, Pear Mead, Sweet Zinfandel.