"Prohibited items, including hazardous materials"...

Faffee has been in Kansas this week visiting her family. While in Kansas she bought her favorite salad dressing which can only be found a this one specific store. During her visit she enjoyed one bottle leaving the other unopened. As she packed her bags for home she put both the unopened and the opened bottle into her suit case. As we were unpacking her the next day she was so excited for the dressing, only she could only find one. She kept wondering where in the world did I put that dressing, this is random why isn't it here?? Then what did we find?? A Notice of Inspection from the airline stating upon screening hers was marked as required for physical inspection and upon physical screening prohibited items including hazardous materials were discovered and the items were turned over to appropriate authorities.

He he he...other then the caloric intake, what is so hazardous??