Sounds like a pretty big day! And yes, if it works for you keep doing it! But i really would prioritise water.
So why not focus on fresh juices? You don’t need a juicer either. Grab a bunch of oranges, melons or any citrus/veg!
For a cheap ghetto sports drink… All you need extra is a fine sieve or a nut milk bag (cheap and very useful!). Small part juice to bottle of water, with a pinch of salt. Tada you have electrolytes, some carbs and vitamins:metal: and less gunk to clean out of your bottle 