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What exactly did these blue plastics do in bottle caps in the past?

When we were kids, we were terrified of getting these out. under “FREE” we’d be excited to see if it was written, but often we were greeted with the text “TRY AGAIN”.

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

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


How are these? from the tap, 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 in it; Thanks to its softness, the liner ensures that there is no gap between the bottle and the cap.

cap plastic blue

By turning inward prevents leakage. You can see it as a practical screwdriver.

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

bottle cap

It is critical because it prevents leaks. bottle caps during shipment It may loosen, expand or contract due to temperature change. If this liner did not exist, spillage and deterioration would often occur. especially in mineral oil, medicines Importance is greater in bottles containing liquids such as:

cover lining

In carbonated drinks It has the property of delaying the exit of the gas. If you are going to put a carbonated drink of which you have drunk part of it back in the fridge, it is therefore useful not to throw this liner away.

These discs on the covers serve a similar purpose.

bottle cap broken

In addition, 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 hold anything that can hold the water in the way we drink it. It also shows if the bottle has been opened before, as you know.

utilities 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 necessary.

Sources: 1, 2

Source: Web Tekno



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