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

FOOD LITMUS / change color of container


Do you remember when did you put tomatoes in your refrigerator?
People throw way food too easily, JUST they didn't know that there are it in a refrigerator or when did they put them in refrigerator.
If You can make a rough guess when did you put food in a refrigerator, you don't have to dump your food indiscreet.
A surface of container that I propose, changes colour to dark and dark by Maximum period of one month from the day you start to put food in your refrigerator. one month later, container changed dark. That means, you throw away rotten food. if you want to restore your container, you can it in water anytime.


Pukung university

Pukung university
Busan, South Korea


Pukung university

Pukung university
Busan, South Korea

kim-dong-gyum shin-hoon-hee choi-young-chol son-ho-gil