Intermediate Bulk Containers (IBC's)
IOI has concept designs in both an all metal "bag-in-the-box" and a polyethylene "bottle-in-the-box." Both designs are:

Reusable up to 30 times
Recyclable
"Knocks-down" virtually flat for increased return shipping density
7 Total Parts
Can be cleaned between uses
Can be shipped Globally
Stackable to four high
Can be stored outside
Competitively priced