Additional uses of Kool-Aid:

Yes, I've seen this actually done... the US Navy uses large packets of unsweetened Kool-Aid to clean out drains! It is mixed with only about ¾ of the water to make it concentrated. The mixture is then dumped down the slow-running or grease-filled drain. In about an hour, the drain is rinsed out with clear water. The brass drain cover looks as though someone had spent hours scrubbing it with a metal brush. The drain is completely cleared of grease.

The active drain-clearing material seems to be citric acid in a very concentrated form.

It was about this time I stopped drinking Kool-Aid. If it did such a nice job on drains, I'm wondering how shiny my insides were.