Bottles made of high-density polyethylene with polypropylene screw closure. Safe, durable, cost-efficient line of wide-mouth bottles for packaging and transporting hazardous materials. Recommended for customers who are designing, assembling and certifying their own combination packaging. Wide mouth allows for easy filling of dry materials or liquids. Heavy duty walls. Split- and puncture-resistant. Molded into the bottom: IP2 marking, material, volume, registration notch and NALGENE® brand name. Evaluated at 15 psi (103 kPa) per 49 CFR 173.27 (c) (2), ICAO Technical Instructions Part 3-1; 1.1.6.1, and IATA Dangerous Goods Regulations Section 5.0.2.9. Leakproof.