Raise a mug full of coffee to the U.S. National Parks and their father, John Muir! Colors and shapes chosen for this enamel mug, have given it its amazing, vintage look. Acadia coffee mug is one of 5 available in our U.S. National Parks collection. For travels, for home, for work. Check out all of them! Enamel is a hard material that can survive a lot. However, exposed to a big pressure, it will break (just like glass). Don't throw your enamelware. We encourage you to read the returns and complaints policy before making a purchase: https://emalco.com/refund_returns/