This is a pee-pee boy, and it’s used by tea enthusiasts to test whether water is hot enough to brew tea. Some say it’s the oldest thermometer in the world. But how does it work? We look at the science behind it.<br /><br />If you liked this video, we have more videos about Chinese craftsmen and Yixing, China’s pottery capital. <br /><br />How the Masters Make A Classic Yixing Teapot <br />http://www.dailymotion.com/video/x7d28va<br /><br />The Men Who Make 6-Foot Pots<br />https://www.dailymotion.com/video/x7u4hiw <br /><br />Follow us on Instagram for behind-the-scenes moments: http://instagram.com/goldthread2<br />Stay updated on Twitter: http://twitter.com/goldthread2<br />Join the conversation on Facebook: http://facebook.com/goldthread2<br />Have story ideas? Send them to us at hello@goldthread2.com<br /><br />Producer: Jessica Novia <br />Videographers: Shen Xinzhuo and Hanley Chu <br />Editor: Joel Roche <br />Mastering: Victor Peña<br /><br />Music: Audio Network<br />
