When I read the title, I immediately thought of the borosilicate glass teapots made by the long-time Australian artist Peter Minson. You can see examples
on his website and at
the Craft ACT online shop (about three items down the list).
Peter Minson comes from a family of of scientific glassmakers in Sydney. He experimented with his own pot furnace in the mid-1970 and then worked blowing furnace glass at the Paris Creek workshops near Adelaide in the late 1970s and early 80s. Since then he has returned to his roots, lampworking borosilicate rods and tubes, mostly making decorative and functional household items.
There is a distinction here between Pyrex the brand name and generic heat-resistant borosilicate glass, as used in laboratory equipment. From elsewhere on Minson's website, I gather he may use a different brand of the material.
Trevor