Hi littlebear, welcome to the show.
These ashtrays used to be on the markets a lot about 20 years ago but I have not seen any in a long time. Colours are red, green, blue or yellow with a white spiral and I was always under the impression these are from Empoli, in the Florence region. But I'm not quite sure about that. In any case, they have no relation to this topic as the ashtray discussed above is thickwalled and free formed, not thinwalled and blown. So a moderator will come along and split off this topic into a separate one...