Underground fridge goes back to basics to save money and the environment

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With all of the smart, connected Internet of Things devices we've seen recently, it's refreshing to see entrepreneurs still drawing inspiration from the simplest and most effective ideas from the past. The eCool, an underground fridge for cooling canned drinks, is one such device. The eCool is based on the centuries-old practice of using the coolness of the ground to keep food and drink preserved and chilled. It's the same principle which modern cellars operate on, and, best of all, it requires no electricity. To install the eCool, users will need to dig or drill into the ground to accommodate…

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