An old bronze cup

It was a violent bloody fight with the last of the blood suckers. A few fair number of the runner team was down and out for good. Their fight over, all that was left was to make sure none of them returned.
Stumpy "This sucks. I hate it when good people go down." 
Jacen "Wish Christy had been free, we could have used her mojo lights and fireworks."
The Boy Debois "Fuckin aye, that blonde slitch got away again. Tanjit, I got this talismonger's fetish to use on her. Gonna shag her so hard that my juice will bring her back to life!"
Mister Black "You're a right sorry freakish bastard."
The Boy Debois "And you should be pushing daisies in the pauper's row."
Stumpy "Both of you muppets shut yer mouths. We need to get out of here with all this gear and junk. Figure out what it is if anything."
Later as the runners unloaded their ill-gotten goods one of the cherry noobs doubled over gasping and retching up his guts. An explosive stream of steaming dark crimson almost black blood mixed with steaming stomach acid and putid green bile.  
Noob "Someone help me, please."
Stumpy "What did you do?"
Noob "I opened a bottle of wine we found and drank it." He retchs more.
Stumpy "Damnit drekhead, I told you not to touch anything."
Jacen "Holy shit he's turning into a vamp!"
Mister Black walks over and placing a pistol to the noob's head pulls the trigger twice. "Problem solved."
Stumpy drawing his own weapon "Mother fucker, I told you not to go around shooting people."
Mister Black "You should have babysat the noob better." Looking around, "Where is the bottle he drank from or glass he used?"
Jacen holding up an extremely old and worn bronze cup, "Looks like he used this."
The Boy Debois, "Yo Stumpy, chill man, be frosty, you know Gigi gave him a pass, let's not go pissing her off."
Stumpy "Mother fucker is lucky she has his back, but if she ever cuts him loose, he's Elvis."
Mister Black squinting, "The cup is laced with mojo, better take it to our little dancer."
Sometime later in a quirky manor house, rooms decorated in Jugendstil, chinoiserie and goblin core with Victorian and Gothic embellishments...
Jacen staring intently at the svelt lithe girl with an occasional glance at some piece of art hanging on a wall or on display in a curio cabinet as she studies the bronze cup.
"Jacen you're looking at me inappropriately again."
"Umm ah sorry Christy, but but it's hard not to when you wear nothing but these very pretty lacy things."
"In my house, I wear want I want."
"So um do you know what the cup is?"
"It is something oddly in a peculiar way perhaps even nasty." She spins it on her slim fingertips.
"But why did it turn Smeadly into a ghoulish blood sucker?"
"If someone fills it with a liquid and drinks it, it will cause them to transform. However, for a vampire, it gives them their daily nutritional requirement of life force and blood. The Boy's girlfriend will want this back." 
"You think she'll come here looking for it?"
She pats his cheek, "Worry not, tell Stumpy that I will secure it in my vault. Oh and thank him for the antique vinyl, this guy Queen has a charming voice." as one lyric rings out softly... "Who wants to live forever...?" as she thinks to herself, another line of research to explore.

Mechanics & Inner Workings

It is a bloody cup. Did you expect it to also tell you the time. You're a muppet.

Manufacturing process

Some ancient dead guy made this in his primative shop by hand.

History

Unknown, believed to be from at least 3600 BCE

Rarity

Unique, one of a kind.

Weight

240 grams

Dimensions

7.2 cm tall 2,4 cm diameter

Base Price

buyer's market

Raw materials & Components

It is made of bronze.

Tools

Smelted by hand, cast in a mold, some hand engraving of vines and flowering plants.