Unsupported browser

You are using an outdated browser. Please upgrade your browser to improve your experience.

Sign up for an Award

Participate with your entry in one of our professional or student awards.

Sign up for an award

Sign up for a Profile

Create your own profile and publish it in the iF WORLD DESIGN GUIDE.

Sign up for a profile

Learn more:


Present your project for free and win your share of EUR 50,000 in prize money.

Publish your project

Whistling Lid / Whistling Lid

Whistling Lid
Whistling Lid

Many people when adding water into cups often over-fill the cup resulting in unnecessary waste. For the blind public filling a cup properly is not an easy task.When an object such as water enters the whistle cup, the air in
the sealed cup is squeezed out generating gas flow through the
small whistle opening in the center of the lid. This sound continues
as water is added informing the pourer that the cupis filling until it
nearly full of water. The whistling reduces as the cup gets filled to
a sufficient quantity to ensure it is full but will not overflow.


Chaoyang University

Chaoyang University
Industrial Design
Taichung City, Taiwan


Chaoyang University of Technology

Chaoyang University of Technology
Taipei, Taiwan