This item boasts a dazzling, iridescent rainbow sparkle and is a beautiful piece with deep hand-cut detailing and stunning edge lighting (images 7 and 8). The cutting is quite intricate. It has a flexibility unlike ordinary glass. The elegant, high-pitched sound when flicked with a finger is something I feel is a testament to this product being hailed as one of the world's finest. This item was stored for a long time at my parents' home. It is from the collection of my mother, who was a crystal glass enthusiast. Based on the craftsmanship and my mother's preferences, I believe it is HOYA. I apologize if I am mistaken. The sharp edges and the high degree of lighting effect make me feel that it is the skill of the Edo Kiriko artisans who were involved. It is also said that the ability to make cuts of the same depth regardless of the thickness of the glass is a characteristic of HOYA crystal. The star of David-like cut is especially stylish (image 3). When I saw them lined up in the cupboard from a distance, I thought they looked like a pattern for a retro somen noodle bowl, but when I held them in my hand, they were a truly artistic masterpiece. This is a rather large capacity type among this kind of tumbler. I think it is practical. These glasses are in like-new condition, but there is no box or sticker. They will be shipped in a clean box. (Please be aware of any cloudiness from storage.) Set of 3 Size: Approximately H12cm x Φ6.5cm Approximately 283g ※ We are currently refraining from purchases made with convenience store ATM payments. We have had many good experiences with transactions on Mercari, but the unfortunate cases of trouble we have experienced are specific to ATM payments, which led to this decision. Thank you for your understanding. ※ Although this item has never been used, please understand that it has been stored at home before purchasing. ※ There is no original box. It will be carefully packed in a separate box with cushioning material and shipped. ※ Since it will be shipped from Okinawa Island, it may take several days to arrive. Thank you for your continued support. ^_^