User blog comment:Krixby87/To Professor Drago/@comment-28082245-20160712012136/@comment-5782071-20160712013702

Actually, most of these are, we just haven't given them effects yet. A few, like the Battery, Egg, and Punching Bag have effects that were described generally, but without specifics. The first two apparently "fried" people with electricity, and the Bag was mentioned in "Mild Mannered", and though I don't rememeber whether it was a suggestion of what the artifact of the episode was, it was said to increase density.