Doctor Who “Keep Calm And Exterminate” Mug Posted on October 29, 2012 By Darryl Weston Doctor Who “Keep Calm And Exterminate” Mug. Packed in a matching plastic display box.Microwave and dishwasher safe! Size: 9cm x 8cm. Product Features Matching presentation gift box Dishwasher safe Microwave safe Officially licensed merchandise