Doesn’t matter what your hot beverage of choice is, the everyday mug has now turned into a mode of communication. This ingenious mug is glazed with a chalk board surface allowing for easy-wipe messaging with a standard piece of chalk. So much better than post-its, it’s great for morning love notes to your sweetie, identifying whose mug is whose when you have a house full of guests, wishing birthday greetings….the list is endless. And could there be a more perfect gift for any teacher. Stick of chalk included. These mugs hold 11 ounces.