Allover the world, lots of food is wasted just because of forgetting in the fridge... You can use magnets that you place on your fridge to remind you about your food. You can cut the magnets at various sizes and stick food pictures on them that they indicate lifetime of food. Then you can stick the magnets on a calendar to remember when you should consume your food.
This video is about 3 things; (1) making something that everyone can apply, (2) making something that needs people's involvement, and (3) making something that does not create extra waste. These 3 things are vital for our future.