The bowl does have a story related to its presence of space.
Vampires are secretive with their laying places, their lair. Being protective of their space they create layers. Each layer has a puzzle woven into a spell or code as its key.
If the code can't be figured out a trap is sprung, and the vampire succeeded in protecting himself.
Should the code be figured out then, another layer is opened configured for the intruder to have another round of delay and another chance at being trapped himself.
This bowl signifies that several layers have been removed and another trap is yet set for the intruder to dismantle and maybe find his object of obsession, the Vampire, laid within his coffined bed, sleeping his strength gaining sleep for power.
I named the piece, "The Trap".