Enjoy the healthy benefits of yogurt and help the planet, too. The process is easy: heat milk, pour it into a large glass jar, add live yogurt cultures and flavor, then place in an insulating pouch for up to 10 hours. Makes up to 17 oz. each batch. Set includes a large and small glass jar, neoprene insulating pouch, stainless steel thermometer, 2 metal lids, and a recipe book.