The rock candy bird's nest drink has expired and can't be eaten. Once the bird's nest beverage expires, it will breed a large number of bacteria and microorganisms. It may aggravate gastrointestinal peristalsis, lead to abdominal pain, diarrhea and loose stool, and do harm to human health. Therefore, it is not recommended to continue to eat bird's nest drinks after expiration, so as not to cause harm to human health.