Creating a design for a box for branding should not be too hard and time-consuming. Once you get access to a box mockup. You can try all kinds of different variations that will help you speed up the process. Here is a box grid mockup that is made by Anthony Boyd Graphics.
It features several isometric boxes in 2 different colors on a white background. In addition to that, you are free to modify the color of the boxes, add your logo, in just a few clicks. You can have a nifty presentation of a box design ready to go and blow everyone away.