This is a collapsible and expandable double-layer casserole carriers for hot or cold food. Food-grade double-sided, high-strength aluminum foil that is odorless, smooth, tear-resistant, and cleanable. The double-layer design effectively separates hot and cold food, maintain good insulation to keep hot food warm and cold food cool.the entire maelstrom expandable lasagna lugger is filled with 6mm of epe foam( accurately measured), which is ultra-soft, safe, and insulates extremely well. Exterior surfaces of the lasagna lugger tote are made of rip-stop 600d oxford fabric plus one layer of pvc coating to provide long-lasting durability while adding extra insulation. As insulated bags for food transport they are excellent for taking dishes to a friend’s house without reheating, maintaining the best taste of the food. Maelstrom lasagna lugger insulated food containers measures 16.4*10.9*7.8 and fits most 9” X 13”/22.8 x 33 cm casserole and baking dishes. Thank you.