Cardboard is commonly used as a packaging material for shipping items. There are several advantages to using cardboard, as it protects items being shipped, is inexpensive and changes shape easily.
As packaging, cardboard protects items being shipped or moved. Corrugated cardboard often has multiple pieces of cardboard placed on top of each other to cushion fragile items, such as pieces of glass, televisions, computers or sensitive pieces of furniture with large flat surfaces. More cardboard placed over an item creates more cushioning and protection for dropped items. This also makes the item heavier and creates more packaging waste.
Cardboard is cheap to produce, and is usually made from recycled materials and doesn't cost much money if purchased wholesale. Other packaging materials are made from plastic, wood or metal, all expensive materials that are often heavier then cardboard, which adds to shipping costs.
Cardboard can be sealed firmly as a package in a number of different ways. Use metal staples to hold cardboard together, as it is thick and doesn't easily tear if a package is dropped or falls to the ground. The surface of cardboard packaging also attaches well to tape or glue, which may be used to seal the package, effectively keeping cardboard around an item until it is opened.
Some pieces of cardboard are incredibly rigid and heavy, to protect what they're packaging, while other cardboard varieties can be wrapped around items so that material isn't wasted and the package isn't bulky or difficult to ship or store. Cardboard that is malleable and can be effectively wrapped around most shapes can be found online.