loading

Step 3: A box with an assembly of rolls

Picture of A box with an assembly of rolls
box with assembly assembly removed.JPG
Another option is to secure the rolls together with tape or glue. They will stay in place better but you loose the flexibility of removing one roll.
Also an option is the arrangement of the rolls, here it's more like a honeycomb whereas the other was square (I am sure there are more appropriate names for this...).