Wagashi (tea confectionery) made to represent spring water and sakura (cherry) blossoms. The artist is trying to give you the "feeling" you might have if you were watching blossoms floating in the fresh spring water as you sip your tea.
Do you know the tale of Hachiko? His loyalty towards his dead owner was so moving that they erected a statue in honor of his devotion. You can see the statue of Hachiko outside of the Shibuya Train Station.