Equal amounts of heather flowers, maize silk, horsetail, uva ursi (bearberry leaf) and cherry stalks (all obtainable from herbalists).
Take one level tablespoon of this mixture for each 25 cl (½ pint) of water: Proceed as for a classic tisane. During the infusion, add to the water half a lemon, half an orange and a small bunch of fresh mint. To serve, strain and serve in a tall glass with ice cubes. Sweeten with sugar substitute to taste. Add the juice of half a lemon, decorate with attractive fruits in season and a few fresh mint leaves.