So there I was behind the petsmart, looking for empty cardboard boxes
When I find two big perfect boxes, and inside they are lined with giant reflectix bags! what a surprise! and they have blue ice style cold packs in them. WHOO HOO. I can use all three. I guess it was fish shipping day?? It's the single sided kind (white on one side, foil on the other) but dumpster divers can't be too picky right?