Heat sensitive labels detect spoilt wine

California's wine industry has begun using a temperature-sensitive label that tracks the wine’s temperature during distribution and can thereby detect any spoilage.

The label is produced by PakSense and has been used in the food industry for about two years. The label is attached to the case of wine and is programmed to reflect a band of temperatures. If a shipment stays within desired parameters, a light flashes green. If temperatures get too high or low, it flashes yellow.