Use room temperature water to brew the tea. The ratio of tea to water is 1g: 100c.c. Let it infuse for 3 to 4 hours before enjoying the delicious and healthy cold tea. If you intended to keep the tea for longer than 12 hours, you need to remove the tea leaves and place the tea in the refrigerator. This should last for 2 days.
For a stock batch of tea, use exactly the same ratio of tea to water then place the batch into refrigerator. After 8 hours of refrigeration it is ready for consumption. It can store for four days.