Whenever I pick up a package of frozen raw meat from the grocery store, I wonder, "How many times did it thaw and re-freeze?" There's currently no easy way to tell, but the ambiguity could be addressed with new temperature sensors from Thinfilm..
Source: http://www.wired.com/gadgetlab/2012/01/printed-circuit-food-safety/
INTERNATIONAL BUSINESS MACHINES (IBM) INTERDIGITAL COMMUNICATIONS INTEL INSIGHT ENTERPRISES