Such chopsticks were once popular with wealthy families, but are rarely used now. The earliest metal chopsticks were made of bronze but because they rusted easily they were replaced by silver chopsticks.
It is said that the silver chopsticks can protect against toxins. In fact, they will become dark only when they are in contact with arsenic or potassium hydride and they do not respond when touching other toxins such as that of globefish or moldy potatoes.
