How does Lancel Airless Bottle's vacuum design prevent product oxidation?

In the field of skin care products and high-end cosmetics, product oxidation is an "invisible killer" that causes the inactivation of active ingredients, deterioration of texture, and even the breeding of microorganisms. Traditional packaging (such as wide-mouth bottles and dropper bottles) often causes premature product failure due to frequent contact with air. Lancel Airless Bottle, with its vacuum tubeless design, has become a revolutionary solution to this pain point.

1. The oxidation dilemma of traditional packaging: air contact is the "natural enemy" of active ingredients
Oxygen, moisture and light are the three major causes of cosmetic oxidation reactions. For example, star ingredients such as vitamin C and retinol are very easy to decompose and become ineffective after contact with air; oil ingredients may produce odors or allergenic substances after oxidation. The limitations of traditional packaging are:
Wide-mouth bottle: After opening the lid, air invades a large area, accelerating oxidation;
Dropper/pump head bottle: After use, the residual air in the bottle forms an "air cavity", causing continuous contact between liquid and oxygen;
Hose packaging: External air refluxes during squeezing, causing secondary pollution.
2. Analysis of Lancel Airless Bottle's core technology: triple protection of the vacuum system
1. Physical isolation: airless vacuum design
Lancel Airless Bottle uses a bottom piston propulsion system to achieve "zero air residue" through a precise mechanical structure. When in use, the bottom piston rises synchronously with the reduction of the content, and the bottle always maintains a vacuum state, completely eliminating the "air cavity" problem of traditional packaging. Experimental data show that the internal air residue can be controlled below 0.1%, which is far lower than the international standard (ISO 10993) for packaging of oxidation-sensitive products.
2. Dynamic sealing: one-way valve and tubeless structure
Traditional pump heads rely on straws to extract liquids, and air is inevitably mixed in during use. Lancel's tubeless design abandons the straw and releases the contents directly through the pressure difference of the bottle body; it is also equipped with a one-way sealing valve, which is only opened when pressed to prevent reverse penetration of external air. This dynamic sealing mechanism ensures that the product is in a "fully enclosed" environment from the first use to the last press.
3. High barrier material: multi-layer composite barrier
The bottle body adopts a multi-layer co-extruded high-density polyethylene (HDPE) and EVOH (ethylene-vinyl alcohol copolymer) composite structure. The oxygen transmission rate (OTR) of EVOH is as low as 0.01 cc/m²·day·atm (25℃), which is more than 1,000 times lower than ordinary plastics, effectively blocking the penetration of external oxygen. In addition, the contact surface between the bottle mouth and the piston adopts a medical-grade silicone seal to further enhance the airtightness.
3. Empirical comparison: the anti-oxidation advantage of vacuum packaging
Laboratory accelerated aging test (40℃/75% humidity environment) shows:
Traditional pump bottle: oxygen content rises to 8% within 3 weeks, and vitamin C activity loses 40%;
Lancel Airless Bottle: oxygen content is stable below 0.3%, and the activity retention rate of ingredients exceeds 95%. In addition, the vacuum design can also avoid microbial contamination of the product caused by contact with fingers, reduce the amount of preservatives added, and conform to the trend of "clean beauty".
IV. Industry Value: From Cost Control to User Experience Upgrade
Extend shelf life: Reduce returns and inventory losses caused by oxidation, and reduce brand costs;
Precise dosage control: The vacuum propulsion system can squeeze out 99% of the above content, reducing waste;
Environmental protection and portability: The lightweight design reduces transportation carbon emissions, and there is no metal spring structure, which supports full bottle recycling.

Lancel Airless Bottle has built an ultimate protection system for oxidation-sensitive products through the "zero air cavity + dynamic seal + high barrier" trinity technical solution. At a time when consumers' demand for ingredient activity and safety is increasing, this innovative packaging is not only a technological breakthrough, but also an important carrier of the brand's high-end and scientific image. In the future, with the development of material science and precision manufacturing, vacuum packaging technology may further penetrate into food, medicine and other fields, opening a new era of "long-term preservation".