Why There Is Always A Gap In Cosmetic Bottles

I don’t know if any little fairy has discovered her cosmetic packaging. No matter how luxurious and exquisite the design is, there will always be a gap between the lid and the bottle. The gap will really kill the high-esthetic perfectionist fairy.

However, I couldn't close the gap by screwing it down with the strength of the milk. I can only persuade the donor, calmly. Since there is a gap, there is a reason for its existence.

The gap after the jar is screwed

The gap between this cap and the bottle is called a hanging foot in the industry. This gap exists in most cosmetic packaging. This is one of the most important conditions to ensure the tightness of the package.

Because when the height of the bottle mouth is lower than the inner depth of the cap, when the cap is screwed to no gap, it is blocked by the bottle shoulder and cannot be screwed down. At this time, the mouth of the bottle does not touch the top of the cap where it can be sealed, which means that the sealing of the package is not good.

Bottle mouth height and cap inner depth

The seamless jar, even if it is sealed with a sealing sticker when you buy it back, after you open it for a long time, the inner material will become dry and shrink.

In this way, the cosmetics in it are really not recommended to be used again, because it is no longer the original thing.

The gap in the dropper bottle

This gap exists not only in the wide-mouth cans of face cream, but also in bottles of lotion and essence.

For products with strong fluidity like water, if there is no such gap, it will be a big trouble, because it is likely to leak during transportation. The same is true. When buying some cosmetic bottles, remember to choose bottles with gaps.

The gap of lotion

Of course, if there are no gaps in the packaging of some cosmetics, the risk of the inner material becoming dry is not great. For some ointment products such as makeup remover, because the inner material has almost zero moisture, there is no need to worry about the loss of moisture and dry out.

In addition, there are no gaps in the packaging design of some products, because the designer of the bottle will control the size of the bottle and the tolerance during production, so it can ensure the tightness without gaps. Of course, look at whether the designer has this confidence. I can control it.