"One Water" is the sweets representing all possible water the sky reflects itself on.
I conceived this as the ritual sweets standing for ties among the consciousness of every human being on earth concerning the water.
そらを映したすべての水をあらわす菓子 One Water。
The horizontal bar means "oneness and whole" in Kanji or Chinese character. A moon is represented by thin gold foil. The water color is different here and there - some part even symbolizes polluted water and waste.