Can report that have completed my trip to Miami with my little micro and had no problems whatsoever with airport security both at Heathrow and Miami. Just put it in a little purse in my handbag and did not get searched and they are really strict in Miami, have got one of the new machines that can see through your clothes and everything 8-o Also my new pen style has arrived from Simon, and it is so much better than the micro, much more vapor and easier to drag. I love it so much I think I will take it to Texas on Sunday!!!