The art of the bar calls for precision - and that's what our laboratory-grade measuring beaker provides. Scientifically calibrated for accuracy, it's marked with fluid ounce and milliliter increments to ensure you're adding exactly the right amount of spirits or mixer. Twin spouts allow easy pouring for right- or left-handed bartenders. Heat-resistant borosilicate glass is flame proof, oven proof, microwave and freezer safe. Laboratory grade; calibrated for accuracy. Easy-to-read measurements in ounces, milliliters, teaspoons and tablespoons. Twin spouts allow easy pouring for right- or left-handed bartenders.