Glass manufacturing is an intricate and lengthy process. Before the glass containers are shipped, they are packaged together in a unique manner. There is something that appears on the cover of a glass packaging, right? It is nothing but a Shrink Film, which is used to overwrap variety of packaging. Made up of polymer plastic, it shrinks tightly on applying heat or whatever it is covering. The best feature about a Shrink Film is that it can be made to shrink in either one direction or even both the directions. The films can be stretched from their initial natural patterns when the films have cooled to adjust the molecules.