This is designed to hold a 12 pack of cans vertically so they can be dispensed from the bottom. The model takes advantage of the original box for structure, so a minimum off filament can be used.

 I have tested only with Coca-Cola products, but i believe the dimensions should be the same on Pepsi as well

Printing: 

walls are only 1.5mm wide, so 2 walls should be all you need
I manually added support as shown in the pictures and used mouse-ear brims on the corners

Tall thin walls don't typically print very well, so if anyone has any suggestions for better print settings please let me know.

I already have made some modifications for a shorter version that should print a bit quicker, and will upload that after I print it.

Version 2: 

Overall height is now smaller to save on some print time and material. I have also made a solid wall version, and added a cutout to the bottom to save on material use.

Thin walls are now 1.6mm as suggested by a few people, works better with the standard .4mm wall thickness of most printers. Thick walls are 2.4mm which should help with rigidity while printing, and make the bridges easier to print.