Rejuvelac is...

a naturally effervescent drink. It is easily made with wheat kernels that have been soaked and germinated. The natural sugars ferment to produce a probiotic drink which is pleasant and mild to taste. It resembles barley water in looks. Despite the fermentation, it is not alcoholic, although I guess the process for making it must be similar.

I added some grated ginger to make this version, which is refreshing anytime of the year, but seems particularly so right now in the scorching heat.