I always threw away the oil cap: A colleague explained to me what it was actually for

Since the plug is asymmetrical, there is always a small gap.

In this space the oil can be measured, ie it is poured out in a thin stream.

If you often cook with oil in small bottles, you may have noticed that there’s a plastic ring under the cap of your oil bottle. While you might think it’s fine to throw it in the trash, this article will show you just how useful it is.

You’ve probably noticed little plastic tabs on oil bottles on more than one occasion. You may have even ignored them, thinking their only purpose was to make opening the bottle more difficult. Well, think again! These tabs have a very real use and can make your life easier in the kitchen. Before you throw them in the trash, find out why they’re worth keeping.
A tab with dual function
The tab plays an important role in preserving oil. It acts as an airtight seal and prevents air from entering the bottle. Air can be harmful to oil, as it can accelerate its oxidation and alter its flavor. It ensures better preservation of the oil and extends its shelf life.

 

Avoid oil splashes and waste.
You’ve probably poured oil into a pan or onto food when you accidentally squeezed the bottle too hard, spilling too much oil. The result? Splashes everywhere, especially on your clothes and the stovetop.

In this case, simply removing the ring and then turning it upside down is enough to avoid any risk of debris or splashes. This saves you money and prevents accidents of this kind.

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