The Behlen Country 2 ft. x 1 ft. X 4 ft. Flex Poly Tank is made with a durable, seamless design that helps resists breakage. All round-end tanks have an extra heavy duty, molded rim and an extra-deep sidewall rib design for additional strength. All poly tanks are made with FDA food-grade approved poly, tested to -20 deg. F, corrosion-free, impact-resistant and recyclable.