I can fill that one!- I'm thinking' double or triple zip-lock for freshness, before boxing up?
Just now delivery is not a problem and just about any type of packaging works. In the summer packages often sit in un climate controlled areas for 10s of hours (110 degrees plus).
Delivery time is approximately 10 days for packages. With that short delivery time anything more than the normal protection is unnecessary. Don't send perishables in the hot months.