Yahoo News This is why crisp packets contain so much air
There's nothing worse than opening a bag of crisps on the premise of a fulfilling salt and vinegar-y snack, only to find the packet is about 84% empty and only contains 11 crisps.
The good news is, though, there's an actual reason for this other than the fact it makes the bag look much fuller.
As Business Insider point out, the bag isn't full of air at all, but rather contains nitrogen gas, which keeps your crisps fresher due to the fact it doesn't react with the molecules which make up the ingredients.
If it were regular air inside the packet, the gas compounds and the snack would react together to make your crisps soggy and stale, meaning you probably wouldn't want to eat them at all – regardless of how many are in the pack.
Without the nitrogen, your crisps would have a shorter shelf life, and wouldn't be as, well, crispy – which explains why crisps go stale when the packet is left open for too long.
And it also explains why your crisps taste the best as soon as the packet has been opened.
So, if you're looking for an excuse for eating a share bag of Sensations in one? This is it.
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