Water, water, water
As a summer beverage, the best thing that is available to you is water. In summers, you need to drink more water if you are going out even for few hours as it can help a lot in providing protection against sun. At least 1-2 glasses of water are necessary for a person per hour who going out in sun to work. Water helps a person to replenish his energy and also provide protection against dehydration in summers.