MP Global Chilled Wine Shipper WS-4Bottle-pre Four Bottle Chilled Wine Shipper with Heavy Duty Box and Bottle Seperators, 4-Pack Ultra-Insulating 1.5" thick cushioning recycled cotton textile fibers are encapsulated between layers Sustainable environmentally preferable biodegradable cotton enhanced insulating fibers contains no foam products or other harmful contaminants Durability tested to exceed ISTA-1A drop test for packages weighing 0-21 lbs Flexible and pliable soft insulation eliminates shrink and damage with no cracked, chipped or broken coolers User-friendly, quick assembly