You can have the tea as a hot as well as cold beverage. To have it as a cold beverage, simply refrigerate it for a few hours after it is made. Usually, it is dried in a paper bag, or bundle and hung. Once it is dried, the leaves are separated from the stems. It is highly recommended to use the leaves within a year, but it can be good for up to 2 years. You can add catnip, lemon mint, chamomile, hummingbird sage, or lemon balm to the tea to further enhance the taste. However, it is advisable to first consult a doctor before mixing the herbs as they could have side effects or cause an allergic reaction.