Superior design: 1 x 1 1/2 oz capacity with external markings for easy identification; internal marking lines at ¼, ½, ¾ oz, barware essential: elongated shape facilitates smooth and easy pouring; precise and consistent measurements for exact pours to help you craft the perfect cocktail, easy to clean: to maximize the performance and longevity of your barfly products, hand washing with mild soap and warm water is recommended. Avoid detergents containing bleach or heavy chlorination.