The lid is a safety valve, turning the red knob and pushing down the button to open the valve. Made of polyethylene. *Cannot be filled with gasoline. Fuel Bottle 0.3 L; Weight: 3.4 oz (95 g); Size: Φ2.6 x H4.6 inches (6.5 x 11.9 cm); Fuel Capacity: Up to 10.6 fl oz (300 ml)