Rhubarb - lemon lemonade concentrate from 20 %
of juice
. about 0.5 kg of ice/ a jar
. 7 lemon slices, optional handful of frozen/ fresh rhubarb in a cube
. 1 kg (i.e. 0.8 l) of the concentrate of the PURENA red rhubarb-lemon lemonade drink
. 4.7 l of water