Wide-mouth design for easy pouring of additives and observing fuel level when filling Heavy-duty body with 10 liter or 20 liter capacity (2,7 US gal. or 5 US gal.) Spill-proof, self-sealing spout automatically pours and shuts off as fuel level in tank fills to end of spout Jug bottom is designed to prevent sliding and spilling in your truck bed Spill-proof spout also available separately Optional adapters snap onto spill-proof spout and let you use the Tuff Jug with karts, marine, lawn mowers and autos Standard cap and plug also available separately Tuff Juggs are available in six colors: green, white, red, blue, yellow and orange.