Like that stuff in the Abyss, only with a tiny demon.

I had a tiny little containerwith i thought a mouseo r something in it ni onxengen ated liquid so i tcould breathe. The hliquid was yellow. eventually the mouse died because al the oxegyn aws gson, or so i thought. i started showing it to people and the liquid was all rlear. when i opened the container a bit, it startedcoming abc to life and it was a little fairy creature inside struggling and gasping for air. opening it a bit let some it, so i closed it off and tried to keep it sealed shut. i showed it nto others and made fun of the thing inside which turned to be an ugly deom on looking thing when i wasn’t giving it hair. it struggled like crazy and i was teasing it. eventually it managed to break a small hole into the container and started growing larger as it got more air. I tied breaking its arms to stuff them back in and close i t back up, but i couldn’t