This double-layer 4-grid clamshell bento box is integrally molded from food-grade PLA. Thickened walls, rims and hinges offer high rigidity with no harmful additives. It is fridge and microwave safe, meeting global food contact standards. Separated grids stop sauce leakage; smooth interiors are easy to clean, and reinforced edges support stable stacking. Fully home & industrially compostable with stable quality, lowering long-term bulk packaging costs for caterers.