This is a one-go (180ml) genuine tin chiro (sake warmer) made by "Suhan." While there are dents, distortions, and scratches, it has been polished thoroughly inside and out so it can be used immediately. A blue-cut glass guinomi (sake cup) (unused) will be included as a bonus. (Generally, glass is said not to break unless the temperature exceeds 60 degrees Celsius, so it should be fine to pour sake at tobikiri-kan (55 degrees Celsius).) Tin's thermal conductivity is 1.8 times higher than that of ceramics, and it is said to change the temperature of sake 50 times faster. Just by pouring a small amount of hot water into your existing vessel, you can quickly enjoy moderately warmed sake without over-evaporating the alcohol. It's also good for quickly chilling sake. Sake Temperature Guide: ＜Cold＞ 5°C: Yukihie (snow cold) 10°C: Hanahie (flower cold) 15°C: Ryohie (cool cold) ＜Warm＞ 30°C: Hinatakan (sun-warmed) 35°C: Hitohadakan (body temperature warm) 40°C: Nurukan (lukewarm) 45°C: Joukan (warm) 50°C: Atsukan (hot) 55°C: Tobikiri-kan (extra hot) Traditional Craft of Osaka Prefecture Made of tin Genuine tin Cut glass Rattan wrapped Chiro (sake warmer) Tanpo (sake warmer) Cold sake pitcher Soba dipping sauce container Ochoko (sake cup) Sakazuki (sake cup) pewter tin Zinn étain stagno estaño