Plastic containers (the ones represented by ‘red lids’ in the book are generally 1.1L in size. I usually go for the ones that are slightly deeper – only because I can also use these containers for prepping and packing meals.
The ‘narrow foil’ containers are the meatloaf size containers.
I use ‘square foil’ containers for pies and quiches etc. Yes, you will have pie dishes at home. I like the square and rectangle shaped ones as they fit better in a freezer.
The ‘rectangle foil’ containers are best for lasagnas and casseroles.
You can often purchase containers at $2 shops or variety stores.