MIT students Heidi Chen and Nicole Tariverdian have designed a lovely "smart" bag that ensures that you will never leave home without your essentials.

You can tag up to 5 essential items — from your phone to your keys — using RFID tags and the bag will automatically alert you via the LED display whether you have forgotten something.

The best part of the project is that is open source using the Lilypad Arduino system and they have kindly provided the code for you to tinker with.

Find code and tutorial here.

Watch the video below to learn more about how the bag functions: