Do the bad rewards from the quest Cacklespit's Brew have any hidden value?
Solution 1:
It doesn't appear to do anything special. I gave it to my pet and it fled around for 12.5 minutes. I intend to take it myself in another playthrough just to see if I can survive it. If you have over 90hp/sec regen you should be able to survive just sitting there.
There is a second cacklespit quest that you can get if you complete the first one. There you kill him.