How can packaging relate to science and/or engineering design (look up this term if you need to)?

Packaging relates to science and/or engineering design in several ways. First and foremost, theres science behind the artistic design choices used for packaging to make items more appealing to people. A lot of it is psychology related, like certain patterns and color choices and shapes for a package making the item more appealing, and then the engineering design goes into that as well but- The engineering half also goes into practicality. Take for example, a salt grinder. Certain paper pattern wrapping around the item will make the salt look more enticing for someone to purchase, and the engineering of the top of the salt dispensary will also be practical and appealing (or- that’s the goal anyways) for the item to be purchased.