The Iron Flask 12 oz Narrow Mouth Water Bottle keeps your thirst at bay in a convenient way. This mini hydration magician is made from the highest-quality stainless steel and double-walled vacuum insulation that keeps your drinks cold for 24 hours and hot for 12 hours without breaking a sweat. A leak-proof flexible straw lid makes it easy to sip your favorite bevvy while you multitask, and the included stainless steel lid and flip lid with a practical handle give you plenty of drinking options for every event.