Carrier is insulated with closed cell foam with a nylon liner to allow the water bottle to easily slide in and out. A drawstring top keeps the water bottle secure and protected from dirt and weather. The front pocket is a handy place to store keys, cell phone or a snack. Includes a one-liter stainless steel water bottle! Our water bottles are made from high quality food-grade stainless steel that's totally free of BPA and other toxins. The wide mouth design fits most water filters.