Here is a smart lunchbox powered by sunlight that keeps your meal hot or cold. The SunnySide has self heating and cooling capability. It has a built-in thermometer and an app that lets you control the temperature of the lunchbox to keep your food fresh. The induction coil heats your food at up to 75c.
The Sunnyside can keep your food fresh for up to 20 hours and heat it up to 7 times. It has a 10,000mAh battery that you can use to recharge your smartphone. This product is currently getting funded on Kickstarter.