Chinese herbal cooling teas are traditional medicine for heatiness fever, a common ailment in this part of the world. It's like drinking air-conditioning for your body even though it tastes horrible.
Last time you have to brew the herbs yourself. Nowadays, HockHua Tonic and a few other TCM halls have started pre-packing these drinks for our convenience, prices range from $1.20 to $5.
So if you are supposed to drink 1 bottle every 4 hours over the next 2 or 3 days, that's a $100 prescription right there. Nobody does that of course, people just buy 1 or 2 bottles and pop antibiotics.