I am the webmaster for vaselineglass.org, and I can tell you it is not at that site. Boyd made a similar one, but their version has a little pattern around the upper rim. I think Mosser Glass, Cambridge, Oh made this version. If it was not them, then it was Summit Glass. In either case, it is a new piece. They sell on ebay for about $10-15.
Mr. Vaseline Glass