In California you can:
Marry at the age of 18
Purchase a shotgun at the age of 18
Vote at the age of 18
Drive at the age of 16
But you cannot purchase liqueur chocolates until the age of 21.
I am glad that the lawmakers of this fine state understand the importance of candy with a tiny amount of alcohol requires so much extra maturity. No 18 year olds on a Godiva fuelled drive by shooting rage in this state.