Thanks Tim, as ever it is possible to find conflicting information! Mr McConnell gives a design date of 1969 for the bottle and tumblers with production starting in 1970. The tumblers were made until 1973 by Iittala, he gives a design date of 1971 for the jug (calling it a carafe), also made by Iittala but presumably a more limited production run. The bottles were made at Karhula.
I remember a Finnish friend in the 1980s telling me that Finland had a massive alcohol problem at the time and that bottles of spirits had an added chemical that would induce vomiting if consumed above a certain amount. Never checked that out but assume it was true then.