12 Inch Blueberry Double Ring Soft Glass BeakerDescription Soft glass Slide bowl Diffuser downstem Base diameter: 110mm A new generation of soft glass design that's the first in the world. These bright additions to the Blueberry family have new connection fittings. Unlike most soft glass, this design has an angled neck that stabilizes the slide bowl. The rubber gasket's only job now is to create that airtight seal needed, which was its intended function. The glass is thick with three rings for an