Thank you for viewing. This is a brand new, unopened "Yokoyama Tsubame-Jyuku no Waza Temperature-Sensitive Stainless Steel Tumbler 420ml EJK-401." It's a beautiful item with a koi carp design that changes color when cold beverages are poured in. [Product Details] ・New and Unopened ・Authentic product ・Capacity: Approximately 420ml ・Material: 18-8 Stainless Steel (Made in Japan) ※The pattern color changes when cold beverages are poured in (effect may diminish with wear) [Highlights] ・Koi carp design expresses traditional Japanese beauty ・Unique feature: the pattern color changes when cold drinks are poured ・Large size (420 ml) for ample enjoyment ・Made-in-Japan quality, perfect for gifts #aki's Helpful Shop