Featuring a 30L large capacity and high-quality insulation, the cooler backpack maintains your foods' temperature for extended periods, making it perfect for your picnics, hikes, and other outdoor activities. The interior is lined with a thick foam and a leakproof PEVA liner. Crafted from heavy-duty polyester, this backpack resists rips, tears, and scratches, yet remains lightweight for easy transport. Both the aluminum film inner layer and the overall construction boast waterproof and oil-proof qualities for hassle-free cleaning. The top of the backpack features a small, strategically designed opening that allows for quick access while minimizing temperature loss. It's an ideal solution for keeping meals hot or cold when you're headed to work, the beach, on a road trip, or enjoying the great outdoors. Customize this cooler backpack with your company's name or logo using silkscreen printing to keep your brand visible as your clients venture out.