Set of 2 or 3 nested vending trays with sticker

Are the trays to be used by groups of 2 or three people?
And is the volume of the trays together a bit of a problem, to take to the location or to store?

This set of nested vending trays hardly takes up more space than a single tray.

The largest tray is Large 530x430x60mm the smaller ones precisely fit in to that one.
The combined trays are 530x430x 70 mm high (2 trays), or 80 mm high (3 trays).