The Kaluga vacuum tin is customized exclusively for premium sturgeon caviar. This article analyzes its specification adaptability, spatial structure and foreign trade circulation advantages purely from the size perspective. Aiming at the large and plump physical characteristics of Kaluga caviar roes, the tin adopts scientifically customized inner dimensions to avoid roe deformation caused by cramped space in ordinary cans. It covers standardized mainstream capacities including 20g, 30g, 50g, 100g, 125g and 250g, satisfying portions for personal tasting, luxury appreciation, business gifts and commercial bulk packaging, suitable for high-end catering, cross-border export and customized gift scenarios.

　　With scientifically optimized diameter and height ratio, the reserved inner space provides sufficient margin for vacuum extraction and prevents roe shaking during transportation. The widened flat bottom enhances contact area to avoid tipping during cold-chain transportation and stacking. The precisely calibrated can mouth fits automatic vacuum sealing machines with tiny dimensional tolerance, compatible with mainstream domestic and foreign sealing equipment to improve mass production efficiency. Uniform wall thickness remains unchanged across all sizes to maintain consistent compression resistance and protect precious caviar from deformation.

　　Custom non-standard sizes are available for limited-edition and large-capacity gift customization. All dimensions comply with universal export measurement standards with accurate capacity, meeting customs inspection, food traceability and commercial weighing regulations. The standardized outer size enables orderly container stacking with low void rate, maximizing shipping space and reducing logistics costs. Compact sizes suit portable gifts while large capacities support merchant inventory and kitchen reserves. Featuring diversified specifications, reasonable inner space and strict export tolerance, this Kaluga vacuum tin perfectly adapts to caviar packaging, cold-chain storage and cross-border sales, serving as a high-precision metal packaging container specially customized for premium Kaluga caviar.