Make your own bitters? These dropper bottles are perfect for storage and dispensing. If you don't make your own bitters there are a million other things you can do with a dropper bottle and thankfully, these are totally reusable. When you think about it, the possibilities are endless. In stock and ready to ship. Features: Made of clear glass. Black dropper style cap. Ideal for storing cocktail bitters. Specs: Size: 5.31"H x 1.97" Diameter. Capacity: 4 oz.