Never Trust an Atom - Funny Chemistry Science Coffee or Tea Mug Great gift for science and chemistry geeks. High-quality ceramic material Holds 11 oz / 325 ml of your favorite beverage Lead Free, dishwasher and microwave safe WARNING! Due to the popularity of Neurons Not Included mugs, several unscrupulous Chinese vendors are now selling poorly copied, unauthorized knockoffs of our products. If you buy a Neurons Not Included mug from one of these copycats, youre getting a mug made who knows where, using mugs of unknown quality, using inks that may or may not be safe, and if you need to return it good luck with that. Make sure youre buying from Neurons Not Included to get the real deal!