The high-density polyethylene bottle is excellent for use with dry chemicals. Widely used for collecting specimen and samples. The polypropylene bottles is designed for sterilization purposes. Both bottles feature polypropylene screw closures and 3.5" mouth opening. According to Thermo Scientific, "Fluorinating these high density polyethylene bottles provides a cost-effective alternative to costly fluoropolymer containers. Enhances long-term performance and prevents permeation loss."
Nalgene™ Large Wide Mouth Bottles