The smooth, leakproof aluminum foil interior prevents seepage from spills—just wipe clean to maintain hygiene, resist bacterium, and odors Folds compactly for storage With a modern design and adjustable shoulder strap, this lunch box suits professionals, students, and outdoor activities, transitioning seamlessly from work commutes to weekends outings in a versatile neutral styles This large insulated lunch bag features a roomy interior to hold all your favorite dishes, snacks, and essential Unzip to expand into a double layer lunch bag for extra space, food stacking and crushing, with 13L ( base) to 15L capacity Made with triple layer fabric, including durability Oxford cloth exterior, 5mm thick thermals cotton for 6 hour heat retention, and leakproof EVA lining to spills while keeping food freshness for up to 12 hours Designed with premium materials, this lunch bag includes an oversized side pocket to securely fit most large water bottles, even 40oz tumblers, eliminating the need for extra carriers