The following hazards may exist when drinking Master Kong iced tea for a long period of time:

1. Lead to obesity: Master Kong iced tea contains high sugar content, and long-term intake of large quantities of the beverage may lead to weight gain and increase the risk of developing obesity.

2. Increase the risk of diabetes: Long-term high intake of high-sugar drinks may lead to insulin resistance, increasing the risk of diabetes.

3. Damage to teeth: Master Kong's Iced Tea contains a large amount of sugar and acid, and long-term intake may lead to dental caries and wear down teeth.

4. Damage to the digestive system: Drinking large quantities of Master Kong Iced Tea may lead to digestive discomfort, including abdominal pain, diarrhea, constipation and other symptoms.

5. Contains preservatives: Master Kong Iced Tea contains a variety of preservatives, which may be potentially harmful to the body when consumed over a long period of time.

6. Caffeine: Master Kong Iced Tea contains a small amount of caffeine, excessive intake may lead to palpitations, insomnia and other symptoms.

So, long-term consumption of large quantities of Master Kong Iced Tea may be potentially harmful to health, and it is recommended to drink it moderately or choose other healthy beverages.