Can someone appraise these Brandy Snifters?

My mother worked for a real estate management company and purchased a box from an estate sale for one dollar.  The other items in the box were from the late 19th century or early 20th century.  These appear to be hand blown, although I am not an expert in this area.  There are two gold ones and one green, all in mint condition.  Does anyone know what they are and if they have any value?

Excellent