30L Leak-Proof Cooler Bag w/ Straps & Pockets Insulated for Camping, Travel​ 【30L High-Capacity Design】Engineered with a spacious 30-liter volume (equivalent to 48 cans), this insulated cooler bag effortlessly accommodates family picnics, camping trips, or team events. The partitioned interior prevents cross-contamination between hot and cold items, ideal for 5-8 person gatherings. 【Portable Adjustable Shoulder Strap】Our cooler bag is equipped with a 4cm wide padded handle and a 130cm adjustable shoulder strap, our dual-carry design reduces shoulder pressure by 40%. The quick-release buckle enables instant conversion between handheld and crossbody modes, perfect for hiking, market trips, or crowded traffic scenarios. 【Keep Warm and Cold for a Long Time】Our thermal bag is scientifically designed with a composite structure of thickened oxford cloth outer layer, inner aluminum foil and inner cotton core. The integrated PVC bottom plate enhances the structural rigidity and can maintain a temperature of 0-4°C for more than 12 hours, keeping food fresh during long outdoor adventures or daily commutes. 【Leakproof and Waterproof Design】This cooler bag features heat-welded seams and waterproof material. The seamless aluminum foil lining resists liquid penetration even when tilted at 30°, while the wear-resistant Oxford outer shell has passed 20,000 Martindale friction tests for long-term durability. 【Versatile Multi-Scenario Application】It is ideal for Outdoor Enthusiasts: Beachside beer chilling (-18°C retention for 6hrs); Urban Professionals: Office meal prep with partitioned storage; Leakproof design doubles as emergency water reservoir cool bag;cooler bag;cooler box;picnic bag;ice box;cool bags large;insulated bag;insulated lunch bag;car cool box;lunch bags