Set of 4 Ryukyu glass rock glasses. Set includes 4 colors: blue, light blue, light green, and wine. Unique shape with a triangular bottom and a circular top when viewed from above. Each piece is handmade, so the shape is unique, which is the charm. They are great for cold sake, tea, and other drinks, and also look lovely as vases or small item holders. About Ryukyu Glass... Ryukyu glass is a blown glass craft made in Okinawa, characterized by air bubbles and vivid colors. It originated after the war when recycled bottles (beer bottles, cola bottles, etc.) were used due to a shortage of materials. The designs evoke the beautiful nature of Okinawa and have a warm feel. It was designated as a traditional craft of Okinawa Prefecture in 1998. The warmth of the artisan's handiwork, the unique air bubbles, and the colors that reflect the nature of Okinawa are appealing, and it is a standard souvenir from Okinawa. It is also characterized by its durability and ease of handling. Size: 8cm x 7cm height I received these as a gift and haven't used them much, so they are in beautiful condition. I don't have many opportunities to use them, so I am offering them for sale. I look forward to your purchase. Thank you for looking.