Here goes a slime

[eishiya]

I think it still feels contained because the edges thicken up as the slime squishes down, instead of spreading out.

[Vinik]

Hmm, damn, back to it then I was thinking some superficial tension would justify puffing instead of spreading, and that breaking  up rendered more spherical puffs than a contained goo. No escuses, redraw.

[Zanorin]

I would really like to see it a bit translucent, with the eyes showing from the back as you said. Maybe it's not gonna work, but I think it could definitely add something

[qbradq]

I really like this last pass. I really enjoy how the globy edges get bigger. It makes me happy

[GoodyPundit]

It look awesome now

[Decroded]

the jar effect is mainly from the edge highlights simply moving up and being filled with shadow underneath.
this creates a vertical plane.
try leaving the highlights around the same place but maybe stretch them upwards to form more of a bulge in the middle.

[Vinik]

Alright, thanks everyone, I'll give it another shot and post here!