As a top-grade luxury ingredient, caviar is expensive, delicate and requires strict storage conditions, which puts forward extremely high requirements for the comprehensive configuration of packaging containers, far exceeding ordinary food packaging. Ordinary food packaging only has basic storage functions with low-end configurations, suffering from insufficient sealing, weak protection, no constant temperature protection, cheap craft texture and poor adaptability. It cannot meet the core needs of caviar such as low-temperature fresh-keeping, light-proof anti-oxidation, pressure damage prevention and high-end display, and easily causes caviar grease oxidation, taste deterioration and appearance damage. Adhering to the full set of luxury-level exclusive configuration standards, high-end caviar metal packaging develops an integrated, highly adaptable, high-protection and high-texture professional metal packaging system targeting the whole-scene needs of caviar delicate storage, high-end brand commercial display, cross-border cold chain transportation and luxury gift giving. Abandoning the simple basic configurations of ordinary packaging, it realizes comprehensive upgrades in six dimensions including base material configuration, sealed fresh-keeping configuration, constant temperature protection configuration, compression-resistant structure configuration, high-end craft configuration and commercial adaptation configuration. Each configuration meets international luxury packaging standards, which can fully protect the original quality and delicate taste of caviar and enhance brand high-end tone and product premium, serving as the preferred customized packaging for high-end aquatic enterprises, luxury ingredient brands, cross-border high-end trade and high-end gift markets.

　　The core basic configuration adopts high-end food-grade thickened metal base material, laying a high-end packaging foundation exclusive for caviar and distinguishing it from the simple base material configuration of ordinary food tin boxes. The entire packaging box is made of imported high-purity thickened tinplate, an upgraded special material for luxury food packaging. After multiple refining, passivation rust prevention and anti-oxidation strengthening treatments, the base material features dense and firm texture, smooth and flawless plate surface and uniform delicate lines without impurities, trachoma or oxidation spots, completely avoiding the defects of ordinary thin materials such as easy deformation, rusting and impurity precipitation. Strictly certified by domestic food contact safety standards, EU LFGB and US FDA international authorities, the material is non-toxic, tasteless, free of heavy metal residues and harmful precipitation. It can be in long-term direct contact with high-nutrition and high-fat caviar without material oxidation or chemical reaction pollution, fully ensuring food safety. Meanwhile, the thickened base material greatly improves box rigidity, toughness, compression resistance, deformation resistance, wear and corrosion resistance. It adapts to complex scenarios such as low-temperature cold chain storage, long-distance bumpy transportation and high-end counter display, maintaining a regular box shape for a long time and eliminating deformation and damage during transportation, fully meeting the high-standard protection needs of high-end ingredients.

　　Equipped with the core functional precision full-wrapped sealed fresh-keeping configuration, it is customized for caviar’s core demands of fresh-keeping, anti-oxidation, moisture proofing and bacteriostasis. Rich in high-quality grease and active nutrients, caviar is extremely susceptible to oxidative deterioration, odor adsorption and moisture caking when exposed to air, requiring ultra-high sealing configuration for packaging. Abandoning the simple buckles and ordinary rubber rings of ordinary packaging, this product adopts high-precision micron-level accurate occlusion sealing configuration. The lid and box body are integrally formed by high-precision molds with accurately controlled occlusion gaps and tight fitting after closing, forming a completely closed independent sterile storage cavity. Matched with upgraded widened and thickened full-covered food-grade high-elastic silicone sealing ring, it features wider sealing coverage, higher fitting degree and stronger resilience than ordinary narrow-edge rubber rings. It is low-temperature resistant, aging-resistant and non-deformable, maintaining excellent sealing performance after long-term cold chain use. The complete sealing system can 100% isolate external air, moisture, dust, bacteria and peculiar smells, minimize air volume inside the box, inhibit caviar oxidation, lock the original fresh flavor and full particle texture of ingredients, effectively extend the refrigeration fresh-keeping cycle, and avoid quality problems such as flavor mixing, moisture deterioration and grease oxidation, accurately matching the professional storage standards of high-end caviar.

　　Exclusively equipped with low-temperature adaptive constant temperature protection configuration exclusive for caviar low-temperature storage scenarios, it is a core high-end highlight different from ordinary food metal packaging. Most ordinary metal packaging has no constant temperature and heat insulation configuration, cannot isolate environmental temperature difference influence, and easily produces water condensation and temperature difference oxidation after being taken out from cold chain, damaging the delicate taste of caviar. This high-end caviar packaging is specially added with lightweight constant temperature buffer protection configuration, built-in food-grade environmentally friendly heat insulation buffer cushion with dense and fitting texture, no peculiar smell and no mildew. It does not occupy excessive storage space and has excellent low-temperature adaptability and stable temperature control performance. This configuration effectively blocks internal and external temperature conduction, alleviates sudden temperature changes during switching between cold chain and normal temperature environments, reduces water vapor condensation inside the box, and avoids caviar particle adhesion and thawing deterioration caused by moisture. Meanwhile, the flexible buffer cushion provides all-round wrapping protection for ingredients, preventing particle breakage and morphological damage caused by transportation vibration and slight impact. Exclusive designed for high-end low-temperature ingredients, the complete constant temperature protection configuration adapts to the whole process of -18℃ freezing storage, low-temperature constant temperature display and cold chain logistics transportation, fully stabilizing caviar storage quality and retaining the top taste and appearance of ingredients.

　　The structural layer is equipped withall-round compression and damage resistance protection configuration, adapting to the high-value transportation and display needs of high-end caviar. In view of the characteristics of high unit price, strict appearance requirements and easy extrusion damage of caviar, this product adopts multiple structural reinforcement configurations. The four sides of the box are reinforced with widened edge wrapping, and the four corners adopt arc passivation anti-collision design, eliminating scratch and bump hidden dangers of sharp corners and greatly improving the overall structural stability and compression bearing capacity of the box. The integrally stamped seamless structure