Good to see u know how to post pic here..Pls always keep us updated with Coke news from your side. BTW, Coke Zero tastes suck ! Sorry, This's my opinion

Hi & welcome from all THAI collector,
I very new collector.Please tell me,what ZERO means?
......It might be not "taste score" as SAM said,right?.......555
I never see black color in coke can before