1-Liter narrow-mouth bottles are safe, durable and cost-efficient. These wide-mouth bottles are specifically designed for packaging and transporting hazardous materials. Recommended for customers designing, assembling and certifying their own combination packaging. Split- and puncture-resistant. Heavy duty walls. Molded into bottom: IP2 marking, material, volume, registration notch and the NALGENE® brand name. Certified for both domestic and international shipping. 50/Case. Nalgene#: 312099-0032. Capitol #: NAL-312099-0032.