Posca is a wonderfully refreshing drink that was used by Romans to deal with a hot Mediterranean climate and hard physical work. If you were poor or a soldier, it’s just vinegar and water. If you were lucky enough to afford it, honey was added.
A sugar, an acid, and water: This formula has been used as an electrolyte replacer for millennia. It’s MUCH better than water for keeping you happy and functional on a hot working day. The Persians did a mint/sugar thing called Sekanjibin. In the medieval period it was called shrub. In the American south it was switchel… until it was replaced with lemonade.
It’s super easy to make:
1 part vinegar (I use Bragg’s apple cider vinegar for its digestive benefits. The Romans would have used wine vinegar)
1 part honey
You don’t even need to heat it – just stir it a little. That gives you a syrup that is shelf stable and great for transporting to events. Dilute it about 10-1 with water in a cup or pitcher. If it burns, add more water. If it tastes bad, add more syrup. I know that sounds odd, but remember how icky a watered down soda tastes when the ice melts?
NOTE: Some people like to add in spices (coriander, ginger, etc) or mint for variety!