I bought this in Singapore 20-30 years ago. PEWTER INDUSTRIES Pewter, a metal with a historical tradition dating back to ancient times. This is a popular set of sake utensils made of pewter, even in Japan. Includes: Sake bottle (Tokkuri) Sake cups (Sakazuki) Tray I have never used it, but there are two spots on the tray that look like stains. I'm not sure if it's the pewter changing over time, but please understand. I don't think it will affect its use, though...