OtterBox Elevation 64 Oz. Growler Tumbler Extra-large OtterBox growler packs along enough water for your whole day or enough brew to share. Elevation 64 is the 100% stainless steel 64-ounce tumbler that carries what you need. Features: - 100% stainless steel for years of use and abuse - Internal copper lining maintains ideal temp - Screw-on, leak-proof lid — not a drop is lost - Sweat-resistant design, leaves no rings - Keeps liquids cold up to 7 days - Backed by OtterBox Limited Lifetime Warranty - Food grade stainless steel - Copper lining