This is a nice quality used shipping container that is insulated and has integrated cold packs.  I'd hate to throw it away so I'm hoping you will want to buy it.
The interior section where your item would be stored cold is 5" x 5" x 3" .  The freezer packs are removable and can be frozen separete from the insulated box.
The whole thing is double boxed cardboard and exterior is 10x10x10 and weighs 7# 5 oz