Our products are assembled, produced and packaged in-house. We use a 100% organic preservative that keeps color, odorless and the taste optimally without aftertaste. So that the shelf-live boilies are comparable to our freezer baits! We advise not to expose the shelf-live boilies to moisture and "large" temperature fluctuations during storage! That way they can be kept for a year. The exact expiration date and lot number are stated on the back of the packaging.