Is clay mineral from the Yasawagi district in Akita prefecture,
Those who live in the district used to take this clay as a secret
medicine for diarrhoea, injury, toothache etc. They call the
clay "marvellous soil" or "magic white
soil." REFRESH is a wonderful gift from the earth, which
can not be produced artificially.
When you put REFRESH into water, the water does not
go bad for a long time.