Foam-insulated for maximum temperature retention. Keeps beverages cold for 12 hours. Built-in fence hooks for easy hangup. Lockable, leak-resistant lid also helps keep spout clean. Marked with ounces and milliliters for easy measuring. Ergonomic side handle provides more support when drinking and carrying. Nonslip side grip for a comfortable and secure hold. BPA- and lead-free. Removable cap gasket for easy cleaning.