Goblet

In my draw there lives a goblet
It's useless because it dissolves when wet
I hid it away in a dry corner
Like an obnoxious hoarder
It will never come out of its cage
Unless I get into a humongous rage
Then I'll need something to smash
Something to kick and bash
Until that day it remains a precious ornament
Like something a king would lament
My useless goblet
That dissolves when wet