It is a dustcart, I have no idea what the blue circle thing is some kind of licence?
Fuller image below
Or do you mean the Chihuly sculpture, in which case it is a fantasy organic shape sculpted from glass, they look good in pictures and flipping amazing in real life.
I think its a mount glued on the inside of the windscreen for what is basically a curtain rod.
ETA:
At first I thought it was an exotic flower from distant lands.
Bin men do value their privacy.
It’s a glass sculpture by artist Dale Chihuly, one of six in Missouri.
Here’s another one near my home (Daum Museum, Sedalia, Missouri)
Beautiful. It looks like a creatures from the depths of the ocean.
If you want sea creatures in glass look up the Blaschka’s.
me, looking at this picture
Lovely though! 
Sleipnir fan art!
Great minds, etc
Little Elvis had his own car?
Just above the camera. You go Canada Goose!
