There is no evidence to show that eating snacks between meals reuces the amount we eat at the next meal. The idea of eating snacks whilst working or walking along is new and has been sold to us by television advertising. Well more or less anyway. The first action to stop weight gain is not to have food constantly pushed at us. So snacks such as chocolate bars and crisps should be sold as they were 50 years ago. In the case of crisps that was in packets of 28 grams or slightly less. No more multi packs or large packs, and no extra charge for buying fewer packs. If a six-pack is £1.20 then 2 packs should be 0.40p. You can still buy 6 packs if you like and eat them all yourself, but at least you will know, that that’s a lot to eat, and not a “saving” by buying in bulk.