Dishwasher Safe: All ceramic and glass Starbucks mugs are easy to clean in the dishwasher. Microwave Safe: For whatever reason, if you can't finish your coffee in one sitting, Starbucks' ceramics and glasses are microwave-safe to reach 'fresh coffee maker' temperatures. They can go in the dishwasher. You can put the cup on the top shelf, it will be washed like any other plate, and you will use it again as needed.