Free-blown borosilicate. The most recent batch was a small one, of 15 pieces. Each one is hand engraved with its own number and includes a Certificate of Origin (please email us to give the owner's name for their certificate). Decanters are packed in wood-shavings, inside a wooden box.The decanter is called the 13° 60° 104° because these are the three possible angles that it can sit at.Some say that at 13 degrees, the decanter is sober, at 60 degrees it is a just a little tipsy and at 104…