There are many benefits to a custom box design, which makes customizing them a great idea for marketers? Custom die-cut packaging can be used as part of your overall marketing campaign. By using custom packaging you can promote your company brand in a very unique and interesting way. Custom packaging will help them do just that and make life easier for them. One of the most popular methods of customizing your product packaging is with cardboard boxes. These boxes are lightweight, and they are also easy to keep clean.