I agree, it looks like the signature is Chris Pantano. He made several lines of large chunky bottles throughout his career, although I don't recognise the particular style of this one. I will include a couple of examples of his signature for comparison.
There are other threads on the GMB which you can find using the search function at top right of the page. Pantano's work is desirable, but don't pay much attention to the astronomic valuations mentioned.
The most remarkable thing about Chris Pantano is the speed with which he went from a novice in hot glass to a very accomplished artisan. He had only started in hot glass the year before (1986), although he already had experience in kiln worked glass. He also had help at times from experienced glass blowers, but he did lots of hands-on work himself.
He had a studio at Montville, about 100km north of Bisbane and on an escarpment overlooking the coastal plain towards the beach resorts on the Sunshine Coast.
Trevor