I don't know that what I had was actually designed for this purpose... but many moons ago I had a styrofoam shipper that fit four 64oz. screw top growlers in it just perfectly. Like it had been made for this express purpose. If you're having trouble imagining it, think of a standard styrofoam shipper that is split and fits 750s snugly and bombers loosely... this was just like that, only fit four growlers relatively snugly. I've done a few internet searches at various times and keep coming up empty. Anyone have any idea where such a thing can be found / know what the hell I'm talking about? Thanks
These are common in the chemical industry, used to ship 2L bottles of solvents. If I buy any solvents from say, VWR Scientific, they ship their bottles in these kind of packaging.
This may work for you. Tool around more on uline as they have a lot of cool shipping stuff. http://www.uline.com/Product/Detail/S-11480/Haz-Mat-Products/4-1-Gallon-Industrial-Shippers
