Doshisha's ONDOZONE Sayu Senka Series Launches Its First Teacup
Doshisha's ONDOZONE Sayu Senka Sayu Nomi, a teacup for drinking sayu (cooled boiled water), goes on sale September 16, 2026, with a built-in heat-absorbing material that cools boiling water to a comfortable drinking temperature in about two minutes and keeps it there for about 30 minutes.