If you really want to start worrying, start thinking how long that stripe sat on the shelf in some warehouse before you bought it.

It was probably made in a big batch at some point in the past and then stored. It's not like milk and eggs at the grocery store where product flies off the shelf and is rotated daily.

How many black billboard 1-year-only stripe sets get sold in a year? How many Cudas get painted in a year?

It's possible the stripe you bought 3 years ago and the one you buy today came from the same batch...