Noka chocolates are a scam. See here for further details:
Best Tooth Rotters - 2006
He was in Dutch and trying to make up for some pretty bad behavior, but when our man brought us NoKa chocolates in their distinctive and very snazzy stainless steel box, our heart melted and our mouth watered. These handcrafted bites of heaven are concocted from some kind of magic dark chocolate, a dollop of fresh organic cream and, who knows, some secret love potion that makes whoever bites into them forget any and all transgressions. The sweets aren't cheap--a few will cost about $20 and more can go up into the hundreds--but sometimes a make-up gift this good is better than diamonds. Make that almost better.