Packaging is a crucial aspect of product distribution and protection, typically divided into primary and secondary packaging. Primary packaging is the material that directly encases the product, providing a barrier against contamination and damage. It is the first layer of protection and often includes bottles, cans, blister packs, or wrappers. Secondary packaging, on the other hand, is used to group primary packages together, facilitating handling, transportation, and storage. It includes boxes, cartons, and shrink-wrapped bundles. Shrink tunnels are integral to the secondary packaging process, particularly in shrink wrapping. A shrink tunnel is a heated chamber through which products wrapped in shrink film pass. The heat causes the film to shrink tightly around the product, securing it for transport and sale. This method is popular for its ability to create a tamper-evident seal and improve product stability during transit. Shrink tunnels offer several advantages, such as enhanced product protection, improved aesthetic appeal, and increased efficiency in packaging operations. However, they also have limitations, including the initial cost of equipment, energy consumption, and the need for specific film materials that can withstand the heat without degrading.