Since I've been dieting I've been intrigued by this - what do you think really fills you up? Because obviously soup weighs quite a lot but it doesn't always fill you up... but I've noticed when I've eaten higher calorie meals I feel quite full. Rice cakes are very very light but quite bulky, but I haven't eaten enough of those to really know if they fill you up. Occasionally I eat a raw carrot at lunch as it's low in calories and fairly heavy, but I don't know if it's very satisfying by itself. Is my body missing some calories in the same way I'd miss the bulk or weight of food if I tried to eat my calories in just chocolate?
Does considering the weight or bulk of something come into it when you make your selections for your meals? I'm thinking more about breakfast and lunch as they're the hardest meals for me to organise for myself - dinners are easy as I know what a serving is there, and the weight for a ready meal is almost always 350-400g... I'm not articulating what I mean very well here, but I know there are some smart posters on here who might be able to intepret for me!