Product Info If you know someone who needs this mug, they are amazing and should be kept by your side at all times. If you find yourself regularly partaking in activities that would probably be improved only by the addition of a beautiful rainbow, then you need this mug. We all need this mug, really... All our mugs are 11oz high glaze dishwasher microwave safe. Designs are printed on both sides. All mugs are shipped out in shatter proof boxes.