A wine thermometer for adhering to a wine bottle indicates the temperature of a particular wine product in that bottle. The thermometer comprises an adhesive backed flexible plastic substrate having three to five predetermined color sections mounted on the flexible substrate with a first color section indicating when a preferred serving temperature for the particular wine product inside has been reached, a second color section indicating when the temperature for the particular wine product inside is higher than preferred and a third color section indicating when the temperature for the particular wine product inside is lower than preferred.