I went on a trip to visit friends, and of course wanted to give them some soap. I had quite a bit packed in my suitcase, so some were laying flat and the rest were on end around the perimeter of my bag. My bag was flagged and had to be opened for inspection. When the agent came to open it he told me the soaps on end around the edge of the bag was what they were looking at, not the ones laying flat. So just giving you a heads up if you are packing a lot of soap - lay it flat or get to the airport early!