Wow, Friskums, I LOVE that colorway!! Nice job! :notworthy: :notworthy: :notworthy:
My first Kool-Aid dye job was...:ick: I've since re-dyed the yarn and now can happily knit with it. (And it still smells like Kool-Aid!)
Kool-Aid doesn't need vinegar because it's already so acidic that it sets the color all by itself. All other dyes I know of do need it.
I'm currently obsessed with dyeing with Wilton's food coloring paste and use about 1/2 cup vinegar total for a 100g hank. (I bought a huge cheapo container of vinegar at Target, and it should last quite awhile.) This is my latest dye: