Vessels - Goo Box

What forbidden delights does this box hold?

Had a lucky mistake with one of the blend layers that I really liked for the goo leaking out of the box and decided to keep it.

Though its not a precise representation I wonder if anyone recognizes the lock/symbol in the center.

Just 1 more to go and i should finally be far enough along that that I can shift attention away from the overhaul for a while.

I'm kind of feeling like I really should make a 9nth box just to make a 3 sets of 3, and in case i end up needing another.

Would really help to quiet my OCD too. XD