Many of the frozen rodent suppliers use thick cardboard shipping boxes lined with the soft and flexible fiberglass LOOKING insulation. I'm sure it isn't fiberglass, but that is what it resembles : )

ULine.com is probably your best bet for the materials.

Dry Ice- that is an entirely different monster. If you only use Ground shipping, on your own account, you can use dry ice. If you intend to ship by Air services (FedEx or UPS Overnight, 2Day, 3Day) then you could get in a heap of governmental and shipping trouble using dry ice. There are specific limitations and labeling issues with using dry ice on an aircraft. Be very careful and follow the rules very closely.

Because of the issues with dry ice regulation and consequences, at ShipYourReptiles our policy is no dry ice period. It just isn't worth the headache.

If you are using your own FedEx or UPS account, don't expect big Ground discounts without significant volume, at least tens of thousands of dollars in shipping per year. Ground discounts of any help are tough to get.

If you can sell and distribute locally, or within a 1 day shipping radius, that will give you the best chance of success. Best of luck!