We made these cute little boxes with two of the Milk Carton dies from Stampin' Up! Cut two and remove one panel (the one without the tab) and adhere them together. You can have an 'iny' or 'outy' closure depending on how you pinch the folds together.
You can then decorate your box in any way you want. I made a punch art bunny and carrots from the Build a Blossom stamp and punch set.