How to select appropriate packaging materials and structures based on the characteristics of cosmetics (such as serums, creams, and perfumes)?

The choice of packaging must align with the nature of the contents and the usage scenario: for example, serums, toners, and other liquid products. For products containing active ingredients (e.g., vitamin C, retinol), prioritize opaque glass bottles (UV protection) + vacuum pump caps (air-tight) to prevent oxidation. Creams and lotions are suitable for wide-mouth glass or acrylic bottles. Pair with screw caps + inner seals (to prevent moisture evaporation). The bottle opening diameter is recommended to be 2.38mm for easy dispensing. Perfumes, containing volatile components like alcohol, require glass-to-glass sealing (to prevent permeation) and spray pump heads (for atomization effect). The bottle's airtightness must pass negative pressure testing (no leakage after 24 hours upside down). Additionally, avoid using standard plastic bottles for oil-based products to prevent material swelling. Opt for HDPE or glass materials instead.

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