Procure a large water bottle and have a glass cutter cut the top off so that the lower portion will form a jar about 8-1/2 in.
Or, they may use a glass cutter to remove a section of the window.
The tools required are a glass cutter, a heavy knife and soldering appliances.
It never occurred to you that he couldn't cut a plate glass window with a glass cutter?
Pant went out after lunch to return with a cheap looking-glass and a glass cutter.