Where did I say that I wanted, "Absolute" anything? I do think that they could give relative answers since they said that they do testing. What's wrong with "Tests indicate double or even triple the useful life of one over the other"? (If that is the case) I certainly do not expect expiration dates on the packaging, although other products provide such information and they are just as "fluid" as plastic zip ties. Obviously, nobody knows or can predict the "Absolute" moment that anything will fail. That would be foolish and unreasonable to expect.