They come in small medicinal-looking bottles and grace the shelves of most bars. Bitters, though they've been around for centuries, are on the rise in tandem with the spread of cocktail culture. Bitters are made from high proof alcohol infused with botanicals and other aromatic ingredients. And, in addition to acting as a digestive, bitters can also cure one common drinking-related ailment. Watch above.
The 411 on bitters, bartenders' secret spice.