Aren't we all! Sometimes I'm Just Crabby Mug. Festive, fun and great quality 11 ounce mug. Original watercolor artwork adorns this festive mug. This mug is sure to bring a smile and joy to someone during the holidays. Fill with paperclips or candy, this mug is a great gift for the office or a friend. This mug is microwave and dishwasher safe. The design is painted in watercolor and then hand-printed onto each mug. Please take extra care with these mugs. Additionally, please do not use bleach or hard chemicals on this pretty mug as it may cause discoloration.