I came across some Contreau glasses which does not fit in the usual drinking glasses' It is not a tumbler or a normal wine glass.

It is square in shape to hold your drink with a long stem glass bottom.

Is it vintage/antique or modern?

What sort of liquor does it hold? I am not a season drinker but have never seen such a shape in a drinking glass.

Could someone please enlighten me? I have attached the images for your perusal.

Google " Cointreau glasses" or use Ebay, loads of pictures.

Modern. It's just a logo'ed promo glass for a currently available liqueur:

http://www.bevmo.com/Media/Images/ProductImagesFull/7104.jpg