All crisps packets come with excess air. It’s a fact of life, however upsetting.
But some bags are emptier than most. You open them up to see a sorrowful few discs of seasoned potato hiding at the bottom of a chasm of despair.
But what brands supply the most foil-based misery? Researchers have been looking into the issue, testing 15 different companies to find the worst offenders.
The study was commissioned by appliance manufacturers the CDA, which bought a bag of each major crisp brand to see how much air it contained.
The famous Walkers contained 53 per cent air, while Wotsits were the fullest packets. Just 18 per cent.
There’s a reason manufacturers load their bags up. They fill their bags with nitrogen to the crisps from going to stale.
Most crisps have a best before date of 55 days. Popchips last for a staggering 290. And, of course, companies are required to display weight in grams, so you’re not technically being ripped off. It just looks as though some bags give you more. Is it deceptive? Not if you pay attention.
A spokesman added: “In addition to preventing staleness, the inserted gas also provides the added benefit of creating a cushioning effect to protect the fragile contents of a packet from damage.
“The packaging expands or contracts depending on the ambient temperature, whereby the gas present in the pack will fill a larger volume when it’s hotter, and a smaller volume when it’s cooler.
“For this reason, the packaging is required to be of a certain size to accommodate the potential expansion of the gas. UK manufacturers are legally governed by Packaging Essential Requirements to minimize excess packaging and can be challenged legally to justify packs which are larger than “best in class”.