are they still being made today?
Yes. The bowls sell well, but don't sell for much money. The prices of the new pieces are given on the link above. The prismatico vases have been made for many years, first by father (Luigi) and then by son. In the case of the prismatico vases, I've read the older vases have a circular opening (info from www.midcenturymania.com/mandruzzato%20vase.html
). The newer vases have a square opening and base. The same may be true for the bowls. I don't know what year the change happened. Hope this helps some.
Mandruzzato pieces are often listed on eBay as Poli. But then, so much gets listed on eBay as Poli that I don't pay much attention to the attribution anymore. The Mandruzzato vases are nice, but are made so that common folk can afford pretty things.