Keyword: zero waste, diy, food waste, beeswax cloth, wax cloth
*A light cotton fabric works fine, as long as it doesn't stretch. The thrift shop is bulging with them! Tip: Search the thrift store for nice cheerful cotton fabrics, wash them at hot temperature and iron well before use. You could also use (farmer's) handkerchiefs. Or maybe you still have an old shirt in the closet.