What Do These Blue Plastics on the Caps Do?

When we were kids we used to be dying to get these out. Under “FREE” we’d be excited to see if it was written, but often we’d be greeted with the text “TRY AGAIN”.

Don’t look at how these tiny bits look like they’re just put there, they’re actually quite It has an important function. Let’s see what is this?

These soft plastics act as a seal. You know, the apparatus with both plastic and metal versions:

How are these from the faucet, from the pipe If it is used to prevent water leakage, the cap liners on the bottles are used for a similar reason.

When we open the lid and close it again after using the liquid inside; Thanks to its softness, the lining ensures that there is no gap between the bottle and the cap.

By turning inward prevents leakage. You can think of it like a practical screwdriver.

By acting as a barrier against air and moisture, it extends the shelf life of the liquid in the bottle.

It is critical as it prevents leaks. bottle caps during shipping It can loosen, expand or contract due to temperature change. If this lining was not there, spills and deterioration would be common. especially in mineral oil, medicine The importance is greater in bottles with liquids such as

In carbonated drinks It has the feature of delaying the exit of the gas. Therefore, if you are going to put a carbonated beverage that you have drunk some of it back in the refrigerator, it is useful not to throw away this liner.

These discs on the covers have a similar purpose.

Moreover, these discs are not only used in carbonated drinks. It even works in drinking water. It prevents the taste of water from becoming dull because it can keep everything that can keep the water in the way we drink it. It also shows whether the bottle has been opened before, as you know.

Now why not used We couldn’t find any information about it. Perhaps with the development of cap and bottle technology, this liner is no longer needed.

Sources: 1, 2