My mom creates these by melting (or slumping) wine bottles in a kiln at high temperatures. They retain their shape and make very cool serving pieces. We've never offered the blue ones before and I think they are particularly stunning. They are available now in our Etsy store for $15.
This is a dark green glass one that my mom added some decorative beading to. The garnet color of the beading really plays nicely with the color of the glass. It is also available in our Etsy store, for $20.