Food waste is an issue that not only affects the planet through greenhouse gas emissions from discarded food in landfills but is also an issue that impacts your wallet. You can combat this problem with the Serva & FOSA® NFC Food Preservation System. When used together, they keep your food fresher for far longer than conventional storage methods. Serva is a small device that you stick onto any food storage container. It uses NFC to connect with its user-friendly app..