Lab Rule 3 - Funny Science Mug - If You Don't Know What You're Doing, At Least Do It Neatly Mug Great gift for science and chemistry geeks. Dishwasher / Microwave Safe - Ceramic Holds 11 oz / 325 ml of your favorite beverage Lead Free, Printed in the US with non-toxic, earth friendly, permanent inks Printed in the USA in our Neurons Not Included Studio