Fifty/Fifty Tank Growler 64 Oz Slate Grey. This growler will keep 64 oz. of any beverage cold or hot all day. Wt: 1.75 lbs. Specifications for Fifty/Fifty 64 Oz. Vacuum Insulated Barrel: Manufacturer: Fifty/Fifty Color: Slate Package Contents: Fifty/Fifty 64 Oz. Vacuum Insulated Barrel The Fifty/Fifty 64 Oz. Vacuum Insulated Barrel is a quality addition to the Fifty/Fifty lineup. For more great deals on Water Bottles by Fifty/Fifty please browse our Fifty/Fifty Camping Gear page.