STACKABLES 10 Pack Plastic Large Flat Rectangular Black Food Containers with Clear Lids ~ BPA-Free ~ Microwave and Freezer Safe ~ Meal Prep Storage Deli Containers 58oz

These are brilliant, especially for anyone into bulk cooking just once per week so you can have a freezer full of pre-prepared meals to save cooking after work each day. Just get out of freezer night before, put into fridge and when you get home from work, just pop into saucepan and heat up. I use for pre prepared curry or soup at present.

Just what I was looking for