Sculptures made of what?

It's time to play "guess that material." What do you think the tall white tower in the middle is made of? It was originally used, as you see it, to display flowers at a 18th C. Viennese table setting. Up at the Met through March, these sculptures and the surrounding exhibition examining the growth of porcelain making in Europe. The rest of the pieces on the table are porcelain, but these twin tower sculpture are made of sugar. These sugar paste towers have been holding fruit and flowers since the 1700s, which is kind of amazing. Unfortunately--the label notes- they are not edible.