The so-called 'NZ Collection' is also called the 'NZ Collection by Murphy'. It means glass made in China for marketing in NZ. I suspect it is limited only by the gullibility of those who think it is made in NZ. There is a lot of it about on NZ's TradeMe auction site, but these days less frequently referred to as 'made in NZ', which the marketing on the glass itself carefully avoids saying.