I've made the choice to offer my clients a pretty USB stick.
Just because it's an easy and simple tool to share and carry the pictures and it's compatible with OSX and most PC systems. You can keep it and reuse it as long as you want.
I realize these packaging myself with eco-friendly materials
Thorough handmade packaging in a kraft box including:
◂ A bamboo USB drive with your pictures
◂ Polaroid size or squared photos
◂ Thank you cards and goodies
Included in all my pricing and services. (Box sizes may change depending of what session you've booked)