Sometimes in life you just havenrsquot got time to make the whole family or office a cuppa which is why you really do need the ninja mug like their covert agent equivalents from northeast asia the ninja mugrsquos greatest skill is its secrecy with its accompanying ninja star coaster ensuring that no traceable water rings will be left behind kitted out in a dark insulating mask to allow for ultimate concealment the ninja mug also comes complete with a spoon in case any peculiar pe