Mass to calories ratio

Hello everyone,

Recently I figured that if I manage to find foods that have a larger mass than calories they could fill me up and I'd still intake relatively little calories.
So far I have found only a few foods of this kind:
1. Heinz Baked Beans - 415g can for 318 calories. Deal. Mainly protein so keeps me full for long.
2. Pickled beetroot - 200g for only 56 calories. Burns fast but an amazing side dish.
3. Gherkins.
4. Egg whites.
5. Most vegetables (tomato, carrot, celery (yuck), lettuce etc.)

Could you guys try to help me find other foods which satisfy this "rule"?

mass/calories>=1

Thanks!