改善人使用牙線容易造成過多浪費的問題每次使用就30~45公分，實際上只需15公分；

將牙線本身重新設計成雙股，並以紅色熱塑區隔，使手指可直接套入使用。

Help you to gauge the length of dental floss and reduce usage.
Redesign the dental floss to solve the problem that people always use it in a wasteful way.
The advantage usage in a traditional way is 30-45 cm, but in our design, the usage is only 15cm.
The Length Teller uses double-stranded floss that is hot-pressed at every 15cm to form a loop that fingers can fit into.