and switchel in its many variations is an electrolyte loaded drink as well as simple things like south east Asian lemonade/limeade... which uses copious amounts of *salt* (it actually tastes salty) in addition to the citrus/water *sugar* mix.
if you order it at an authentic Vietnamese restaurant it may come to your table with a salted rim... and the drink uses the whole lemon - peel, seeds and all so it can be chunky/chewy.