This jar had only one modification which an easily done by hand or cutting machine. I just hallowed out the middle into a rounded edge rectangle.
Very much like the jar above I only to make one modification and that adds a score line near the lid to make it fold. Since you can resize the file you can make all this project as big or a small as you want.
To show you guys how versatile this file is I went from frame type of shaker to plastic covering.
This final jar was used as an embellishment to make a sweet card to give to any friend.