Lots of us are making our own drink mix, which is what I’m referring to, based on podcast info. Tons of discussion on that here. Make SIS BETA fuel yourself just a few pence per bottle
My personal choice is 2:1 Maltodextrine to Fructose, with an SIS tab for flavor and electrolytes. I have a very sensitive stomach and live where it’s very hot, so I’ve battled stomach issues from commercial mixes for a long time. Maurten solved that, but is very expensive, so I now make my own.