Tired of people using your favorite mug at work? Are you having a science teacher identity crisis? Want to make a statement with your morning beverage? Our high-quality beaker mugs hold 400 mL (that's 13 ounces just in case you don't speak science geek). Perfect as a teacher gift or for your favorite frustrated scientist. Each mug is hand-crafted from a real beaker (borosilicate glass) with a large handle for easy carrying. You even get the graduated markings on the side of the beaker to remind you of how much you're drinking or to help you mix up your favorite concoction. Try this... 250 mL coffee, 50 mL cream, 100 mL of that Irish Cream stuff. Stir, drink and fall asleep.