Start with an 8x8 box. There are a few different styles available.
Fill three 6x2 boxes and put them in the middle of the white box.
Alternatively, you can put a drink between two boxes, instead of using 3 boxes.
There will be an inch around the boxes.
Either:
1- put tissue paper around
2- put shredded paper around
3- put glue dots to keep the boxes in place