Another postcard set, just dressed up a little more. Finding a pocket envelope that can even be branded / labeled and send that in a clear envelope to clients. Design and printing costs would be less, production is a little more than other ideas.
Hautbox by Yeal Saferstein, Miami, Florida on Behance curated by Packaging Diva PD. Hautbox is a luxury curated gift box that comes in 12 variations, making gifting for any occasion as simple as a click of a button.