I always threw away the oil cap: a colleague explained to me what it was actually for. (Page 2 ) | April 23, 2025

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

This space allows you to measure the oil, meaning it will be poured in a thin stream.

If you often cook with oil in small bottles, you’ve probably noticed that there’s a plastic ring under the cap of your oil bottle. While you might think it’s a good idea to throw it in the trash, discover its usefulness in this article.

You’ve probably noticed little plastic tabs on oil bottles many times. Maybe you even ignored them, thinking they served no purpose other than to complicate opening the bottle. Well, think again! These tabs have a very real purpose and can make your life in the kitchen easier. So, before you throw them in the trash, find out why they’re worth saving.
A tab with a dual role
The tab plays an important role in the oil preservation process. It acts as an airtight seal, preventing 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.

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