Porcelain

The transparency of the material is clearly visible due to the thin wall thickness. The vessel is by Arnold Annen.

With delicate transparency.

Term for a ceramic material made of feldspar, kaolin and quartz, with a dense, light-coloured to white body (term for a fired ceramic mass).
Porcelain shines through transparently with thin walls and can be fired at temperatures up to 1480°, depending on the type of mass and the intended function.

Bone porcelain represents a particularly noble variant of this material. It is characterised by a brilliant white, high translucency and strength. 

If you find porcelain interesting, you should take a look at these ceramists: