The best way to cool down is water

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With the present condition of earth's climate due to global warming, people like me who lives in the tropics spend so much on energy just to keep cool-- aircon, cold drinks, 5 showers a day. I opened an arguement in my Chemistry class, Which way is a better way to cool down during hot weather, is it taking a shower or drinking cold water. it was researched and debated by my students, however i ended the topic by a simple experiment. warm water of the same temperature in 3 separate glasses, one of the glasses serves as control and left as it is, the ither was immersed in a bowl of cold water, the last we added cold water into it. the temperature was measured after a minute, the last glass has the lowest temperature. This implies that drinking water is a faster way to cool down than taking showers.. how about you? do you think our conclusion is true?