Thermos Vacuum Insulated 24 Ounce Stainless Steel Hydration Bottle, Charcoal Thermos vacuum insulation technology for maximum temperature retention durable stainless steel interiors and exteriors Keeps liquids cold up to 12 hours - more than 10 times longer than an ordinary plastic water bottle Sweat-proof designs won't leave water rings Fits most automotive cup holders; capacity 24oz/710ml