Australian scientists at the University of New South Wales (UNSW) have developed a method of accurately checking if milk has gone bad by using the vibration motor inside every smartphone.

The modern smartphone has been a jack-of-all-trades for a while now, but the ubiquitous gadget is getting new functionalities virtually every day. On of the most ingenious ways you’ll probably be able to use your handheld in the near future is to test if milk has gone bad, either in the comfort of your own kitchen, or at the store,without even having to open the container. Reserachers at UNSW Computer Science and Engineering recently developed a new smartphone sensor called VibMilk that relies on the gadget’s vibration motor and inertial measurement unit (IMU) to check the freshness of milk without having to open the container. The high-tech method could one day curb the current waste of 20% of dairy products.