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

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

If you often cook with oil in small bottles, you may have noticed that there is a plastic ring under the cap of your oil bottle. While you may think it's fine to throw it in the trash, this article will tell 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 because you thought they had no other purpose than to make the bottle harder to open. Well, think again! These tabs have a very real use and can make your life easier in the kitchen. So before you throw them in the trash, find out why they're worth keeping.
A tongue with a dual function