One piece. Brand new, unused. Clear color. I bought a set of two, but one is enough for me, so I'm offering the other one to someone who wants it. A set of two costs 850 yen on Amazon. This type can be molded by biting it yourself in hot water or the microwave. Comes with a simple instruction manual. Easy to bite, comfortable design that doesn't slip, conforms to food sanitation laws, and comes with a cleaning brush and case.