I threaded a skewer through the top of the soaker
This is a pot with a packet of grape kool aid, a glug of vinegar, and about 2 inches of warm water. I used a spare needle to get the soaker to stay up, and put the pot on the stove on low. Every so often I unrolled a bit more of the soaker into the water.
And here's the result!
I'm pretty happy with it :)