Why is it that when you eat a mint, then drink water it is very colder?!
Answers: Menthol's ability to chemically trigger cold-sensitive receptors in the skin is responsible for the well known cooling sensation that it provokes when inhaled, eaten, or applied to the skin. Menthol does not cause an actual drop in temperature.[7] In this sense it is similar to capsaicin, the chemical responsible for the spiciness of hot peppers (which stimulates heat sensors, also without causing actual temperature rise).
That is true! Maybe the mint makes the taste buds more receptive to the cooler temp.