The volume of your insulated food box
Before opting for a particular product, start by working out the size of the portions that the box will have to contain.
Are you a big eater or do you have more of a small appetite?
If you tend more towards the latter, a small box (0.5 L) will do the trick.
If you are going for a long hike and need a high calorie intake, a large insulated box with a capacity of 0.8 L or more will be preferable.
If you are hiking as part of a group or, the height of luxury, you prefer to prepare several different dishes, go for a large volume box (2L) with two separate compartments.