Many of us enjoy a portion of fish and chips on a Friday night and nothing can beat dousing your chips in vinegar.
But a youtuber has now revealed that many chippys actually don't use vinegar as we know it on their chips.
YouTuber Scott Thomas has revealed that most fish and chip shops swap vinegar for a cheaper alternative that will stay in date much longer.
According to the video maker, chippys use something known as a non-brewed condiment - reports Wales Online.
This is a malt vinegar substitute made with water, acetic acid, flavourings and often a caramel colour.
The majority of fish ands chip shops will use this as a substitute for actual vinegar because it is cheaper to buy.
It also takes less time to make than the real deal and you can buy it in concentrated form.
Non-brewed condiment also has other benefits, like not containing any alcohol - making it a good choice for tee total customers.
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