A food delivery driver is transporting hot pizzas on a cold winter night and decides to use a thick, foam-lined thermal delivery bag to keep the food warm.
Explain how the thick, foam-lined thermal bag helps to keep the pizzas warm during transit.
The driver says: "I think I can use a thin cardboard box wrapped in a shiny aluminium foil sheet instead of the thick padded bag to keep the pizzas just as warm."
Do you agree with the driver? Explain why.