Light breaks up to such an extent in the ribs and grooves of pressed glass that you might think it was crystal. But the glass is not even ground; the contours just emerge from the squeezing of the hot glass in the mould. This stable decanter is made of pressed glass.

The light refracts beautifully in the non-slip ribs and fine grooves of this pressed glass. However - they are not even cut, but simply take shape when the hot glass mass is pressed into the mold.