Polar Camel has a superior hot and cold retention of this double wall insulation high endurance water bottle. It features a screw top lid with an easy flip top. Also, features a soft finger hold great place to put a carabiner (which bought separately and can also be personalized), resided ridges for easy opening and closing, and ridged and removable straw for easy cleaning. These bottles are available in 16 vibrant powder coated colors!