Tiny bubbles are fun things when you find them in soft drinks where they tickle your nose.  Tiny bubble can also be used to clean fruits and vegetables removing bacteria that might cause food-borne illness.  Scientists at Virginia Tech University have used cavitation bubbles to scrub the surfaces of tomatoes to remove E. coli and Salmonella.  Some day machines to clean these kinds of foods might find their way into your kitchen and help combat food-borne illness.