I've been using Vitalyte (aka over the years, GookinAid, ERG, and Hydrolyte). It's a powdered electrolyte you add to your WBs of water. Formulated for rapid uptake with just enough glucose to be palatable. I find I can drink large amounts of it in a swig. Important on hot days riding fix gears where in hills, miles may go by with no chance to take the hands off the bars and drink. (Doesn't happen either out of the saddle or spinning 175 RPM.) When I get the chance, I can down a half bottle with no bad consequences.

You probably haven't heard of it because they don't advertise. In the '70 they had a small but solid market of endurance types who knew how well it works. (Formulated by a marathon runner who failed to finish the '68 Olympic qualifier on a very hot day getting sick on GaterAid. He was a bio-chemist by trade and decided to use his skills to make a better drink. In the late '80s and '90s, the heavily advertised sports drinks pushed ERG off the shelves. Not out of business; they had a solid following of 3rd world workers who knew how effective it was reviving people suffering near death dehydration from dysentery, cholera and the like. It came back into my awareness in the '00s when I went to REI to research the next drink I needed and saw that it was back! REI has been on and off about carrying it. Clearly not popular with the bean counters but sometimes the employees insist. Doesn't matter. The company is solid, easy to find on line and ships promptly.

https://vitalyte.com

Oh, when I am under stress, the stuff stays down better than plain water. I drink it when I have a stomach bug because it goes down easily, doesn't taste bad coming back up and I might just get a few of those electrolytes while it's down. (And it's so cheap, why not?)