If your bedroom gets warm and you’re struggling to sleep, you may feel more comfortable if you flip your pillow over so you can enjoy the cooler side. Now, a gadget has been created to keep your pillow cold all night – but with a price tag of around £300, it might be a little expensive. The smart pillow, called Moona, is tethered to a machine that sits on your bedside table. When filled with water, the machine pumps cool liquid into a pad that slips under your pillowcase, keeping it at a temperature of around 22ºC all night long. Moona also connects to an app, which can monitor your sleeping patterns as well as recording how much you move around during the night.