if we talk about customized packaging then Mailer box is widely used to send goods both locally and internationally. They are very popular because of their strength. The sturdy cardboard stock that is used to make them is the secret of their strength. They have a foldable lid that is used to open the package. They can be printed with many colors and designs as required by the businesses. Many of them are printed with the logo and the name of the company. They become humidity and temperature resistant when they are sealed properly. Generally, they have a rectangular shape, but they can be customized into any desired shape.