I always threw away the oil cap: a colleague explained to me what it was really used for

You have probably already noticed small plastic tabs on oil bottles several times. Maybe you even ignored them, thinking they served no purpose other than 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. So, before throwing them in the trash, find out why they are worth saving.
A tongue 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 inside of the bottle. Air can be harmful to oil because it can accelerate its oxidation and alter its flavor. It ensures better preservation of the oil and extends its lifespan.