Vintage Style Square Glass Bitters Bottle. 3 OzEnhance the overall look of your bar by adding this vintage bitters bottle. Functional and attractive, the details of this bitters bottle are what make it a classy addition to any bar. Every bar should have a bottle of bitters on hand. Drops of bitters is typically added to the popular Manhattan cocktail but its also great to have around to add balance and more flavor to numerous cocktails. We designed this bottle personally to add a timeless look