Product Info Looking for that perfect Birthday or Christmas gift? We think we might have found it, this mum mug really shows your appreciation for her patience, discipline and rules... for your 'spoilt' sibling! This is bound to score some comedic points with your mum, just maybe not your brother or sister. 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.