Yes! and a sick reference...
I drink Flavor-Aid, Aldi's version, and sometimes Kool-Aid if its on sale. I specifically like that I can make it less sweet, and I usually use Splenda. The Aldi stuff is 10 packets for .89. I use it all, except for whatever reason I'm not fond of lemonade generally, so that gets tossed.
Last year I went to a 70's party and my cocktail contribution was the "Jonestown Revelation" which was just Flavor-aid and vodka and a fruit garnish. Yes I know, its terrible to make fun of that event.
Anyhow, the phrase "I'm not drinking the Kool-aid" is part of many people's lexicon, at least people of a certain age generally know what it means. However, the stuff at Jonestown was actually Flavor-aid, so the commonly-used phrase is not accurate, historically anyway, probably because most people have never heard of Flavor-aid (Indeed, I know of only 1 grocery chain here that reliably carries it).