Superior design: 1/2 x 3/4 oz capacity with external markings for easy identification; internal marking line at 1/4 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, but all stainless steel products are dishwasher safe. Avoid detergents containing bleach or heavy chlorination.