Cook right drinks of hibiscus, raspberry, currant.

As infusion for are leaves using,they are having more vitamins and micro elements, than in berries, leaves are using fresh or dry, as wash theirs, dry in dark for 3 days.
Chop, remove are hard sides.Boil 2 l. of water are for 100 gr of leaves or 200 gr of dry as enough mass, cool water, in 40 minutes add leaves, mix, close a lid.
Wait for four, filter , as filtered infusion on 1.8 l.add in bottles glass of, not plastic, if transparent are bottles, thus wrap theirs, cold keep, as in metallic and plastic bottles are not keeping, as not boiling infusion, as vitamin c Loosing.
Sour is infusion, thus not drink of alkaline drinks, are caffeine, tea, wait hour,as vitamin c loosing.
As for tea add three tea.sp. of chopped leaves in non metalic pot, add glass of hot water on 80C, for 15 minutes, drinking tewa after you can use leaves used are for two times.
As better teas such drinking in clean not boiling water, but oxygen in such water is dissordering vitamin c, thus fresh tea drink within 8-10 hours.

As you can tea cook and of non boiled water,she is more useful, as this wet leaves on 1.5 hours as on same proportions.