Type I Poly Cans For Flammables Space-saving, Type I oval polyethylene safety cans increase shelf storage capacity by 30%! Trigger mechanism enables the pouring of small quantities of liquid. Leaktight, self-closing cap prevents spillage and automatically vents to guard against explosion. Dual-density flame arrester protects against external heat sources. Justrite's unique design includes a current-carrying carbon insert imbedded into the can for proper grounding.