[Made in Japan Horie] Titanium Love the Earth-Pure Titanium ECO Environmental Straw-Cyan Blue+Wood Handle Straw Brush

How do Japanese horie staff show the color of titanium? Please see the following video introduction https://www.youtube.com/watch?time_continue=1&v=P2quVTEMYuc https://www.books.com.tw/img/N00/108/61/N001086169_t_01.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_02.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_03.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_04.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_05.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_06.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_07.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_08.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_09.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_10.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_11.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_12.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_13.jpg https://www.books.com.tw/img/N00/108/61/N001086169_t_14.jpg