Does it look anything like this?
http://uraseal.com/content/images/thumbs/0000126_es200s-electrical-splice-kit-butt-and-branch-splices-up-to-2-diameter-up-to-600v.jpeg
if it does than her “Electricians” aint
Yep, that’s it. Although the the bottle is pretty beat up.
That looks like a butt splice in a peewee closure, that’s what we called it when I worked for the phone co.