[Item] Corning (USA) "Corelle Morning Blue" Soup Plates, 7 pieces CORELLE by CORNING CORNING NY. USA 1970s Vintage Old Corelle, Showa Retro [Size (approx.)] Diameter approx. 16cm x Height 5cm Product Name: Tempered Glass Utensils Material: Three-layer tempered glass Type: Fully laminated tempered glass (Vitrelle) Country of Origin: USA Dishwasher, Microwave, and Oven Safe Corelle In 1970, Corning (USA), the parent company of Pyrex, created this fully laminated tempered glass tableware using world-first technology. The three-layer glass called "Vitrelle," which sandwiches a milky white glass in the center between upper and lower transparent glass layers and then heat-compresses them, made it resistant to "impact" and "heat." ● More impact-resistant than ordinary tableware ● Heat-resistant glass, safe for dishwashers, microwaves, and ovens ● Thin and lightweight material. Saves space when stacked ● Made of safe, fully laminated tempered glass ● Impermeable surface, prevents stains ● Can be used hygienically for a long time Versatile for soups, cereals, fruit yogurt, etc. This item has been stored at home. It may have been used a few times, or perhaps not at all. In any case, it is a relatively clean item. Thank you for your understanding.