Is bamboo based plastic less likely to leak chemicals?
Inspired by the other answer and the comment to my question, i have dug a little deeper. The tableware in the picture is sold by a company called Zuperzozial and made from bamboo and corn reinforced with melamine resin.

Many similar products are sold, almost always without a brand name and always without any specification of the actual material. So I will answer my question for this specific set of cups, there is no way to tell if the answer holds for 'bamboo' tableware in general.

Melamine from tableware may leak into the food, especially when heated, according to the FDA. It is ok to serve cold drinks in a melamine resin cup. The claim that these cups are micro-wave safe is not true.

As for the amount of BS of the rest of the marketing claims: bamboo and corn are renewable sources. But i'm not sure how degradable a resin is.