There’s nothing more disappointing than opening a family bag of crisps, only to discover that half of the bag is just air. But just how much air do certain brands contain? Which are the best ...

They say bigger is better when it comes to our food portions, and that certainly proved to be the case for one impressed Brit who tucked into a packet of Walkers crisps. So delighted was the snack ...

Those students ate the same amount of crisps from small as large bags. However, those with the smaller packets were again more likely to open them. Three quarters of the group with small bags ...