Amazon.com: Swig Life: Packi Backpack Cooler。Keeps contents cold 48+ hours Durable, dual zipper pulls for easier opening and closing Wireframe design opens fully to allow for wide access Exterior, PVC-coated polyester shell is waterproof, wipeable and puncture-resistant Lightweight and condensation-free Empty ice as it melts to avoid leakage Interior height is wine bottle friendly Top handles are great for grab & go lifting Adjustable shoulder straps include cushioned shoulder pads for extra comfort and support Reinforced nylon webbing and sturdy polypropylene hardware to safely hold maximum weight Magnetic closures on easy-access side pockets, which comfortably fit Swig Life 20oz Water Bottles (sold separately) Secure back zippered pocket is perfect for storing valuables Capacity: 3.5 gallons (16 liters) Holds 16-24 bottles and cans + ice Holds 4-6 wine bottles + ice Some light wear on bottom\' one side seam inside came loose