no idea but the iso 11119-2 certification was out a fair few years before 2016, there are other bottle makes that don't have a death date ( technically all iso 11119-2 certified bottles have unlimited life span but makers are still putting 15 years on them.) but they don't advertise the fact. presumably it's a second hand bottle you're looking at, if it doesn't have a death date on the label it doesn't have a death date. like this guerilla air, it only has a born date of 2013/05.