This neat looking cocktail glass was made by Heisey in 1947.  The line is #5048 – Rooster Head.

According to the book Heisey Glass 1896-1957: identification & guide by Neila and Tim Bredehoft, these stems were sold with Heisey’s #4225 Cobel cocktail shaker or the #4036 shaker with the Rooster Head stopper.  The stems came in crystal, and in a crystal bowl/amber stem combination.

The book also advises that there are other similar Rooster Head cocktails of unknown maker(s) which are not so finely made and come in various colours.