This is a set of two Nousaku sake cups. They are new and unused; I opened the box for the first time to take these photos. The inside is silver and gold (looks like gold leaf). Please refer to the images for the size. ■ Tin (Suzuk) Since ancient times, tin has been said to remove impurities from sake, resulting in a smoother flavor. Tin, a metal that is resistant to rust and decay, is considered auspicious and is also recommended as a gift. Due to its high thermal conductivity, it is perfect for enjoying cold sake and warm sake (up to lukewarm). You can feel the coldness even more if you chill it in the refrigerator for 1-2 minutes before use. Tin is said to have the effect of mellowing the taste of sake, and you can enjoy comparing it with sake poured into a gold-leafed cup. Why not drink sake from these cups during the New Year's holiday❓ Please note that there are no warranties, claims, cancellations, or returns/refunds for these sake cups. Thank you for your understanding.