Its a simple box with a small infill for the permimeter wall. when you download the file it will contain the box and the lid both set to the default matching dimensions. Meaning you can print and go without re-sizing. But the container was also created to be modified. You can easily scale the box and lid together to maintain proper dimensions so that you ensure a proper fit. Add text to the lid or outside of box for cool design. Modify the negative inside the box to create a larger container wall and make more sturdy. Modify the Lid lip object to make it deeper to create a larger lip. 

No supports needed