Start making your homemade electrolyte drink by brewing the tea and letting it cool slightly; or, slightly warm your alternative base liquid.
This homemade electrolyte drink will last a week in the refrigerator. You can always double or triple the recipe to make a big batch if you know you'll be needing it.
You can also make this recipe with half the liquid base, and freeze it as ice cubes to use as needed. Simply fill a glass with the electrolyte cubes and add water.