tea is considered to be the best consumed drink after water. In the past few years,but Tea has certain disadvantages.It brings the chance of gastric ulcers,tea has tannic acid. If person drink tea is the maximum quantity then he may experience the problem of iron deficiency and anemia.
if person consume too much tea then he may experience different diseases like kidney disease and liver disease.
As it's summer, I would prefer coffee over tea,the reason is obvious, tea has lesser amount of caffeine than coffee.