These Longdrinkglasses are a Mid-Century Highlight. Made of very lightweight smoke glass these seem to be very old. The base is heavy and more sturdy with a beautiful square shape. 
Sold as a set of 6. Last picture shows them next to the matching water glasses. 
 
4 are in good vintage condition. 2 have a small chip on the top edge as can be seen in the pictures. Some small bubbles and imperfections in the glass are always possible with old glass objects.