Focus on the pronunciation of shelf life
English definition of “shelf life”
› the length of time that a product, especially food and medicine, can be kept before it becomes too old to be sold or used: a short/long shelf life Vacuum packing gives the fish a shelf life of a couple of weeks. The product would be expensive to make and have a limited shelf life.
› the length of time that something remains useful, popular, successful, etc.: Today's technology can have a brief shelf life. Self-help books have a longer shelf life than other bestsellers.