This is a hi-res (3456×3456px @ 300dpi) plastic / foil food-bag mock-up .psd with 2 different background-stages.
I’ve used smart-objects to make the content of the bag very flexible. You can edit the 3 predefined color versions, or remove them and place your own graphics inside the smart-object.
Get sure to fill the complete smart-object-file with a !!!!! (color or whatever). The doubled smart-object in the main file structure updates itself. You only have to edit one of them -> double-click on the layers thumbnail.
So now enjoy this file have fun!
Free fonts used:
http://www.josbuivenga.demon.nl/fontin.html and http://www.impallari.com/lobster/