All mugs are dishwasher and microwave safe. The large mugs are great for beer, put them in the freezer. Just don't go from the freezer to boiling water. The severe change in temperature could cause a crack. All mugs are great for warm and cold beverages, soup on the go. Please note that I love raw clay! Raw clay is unglazed clay with a semi-rough surface. This is true of tree bark mugs and many of the dark clays. The outside of the mug may be unglazed or partially glazed, but the inside is always glazed for ease of cleaning. Be sure to read the description under each product to ensure you are completely satisfied. It also lists the size and approximate ounces held. To understand the pricing and coding, PTS, TS, and ED please go to the pricing tab.