Savillex’s PurillexTM range of fluoropolymer bottles is the cleanest, safest and highest performing range of fluoropolymer bottles ever produced. Available in both PFA and FEP, Purillex bottles are manufactured by a proprietary stretch blow molding process, adapted for fluoropolymer use by Savillex. This provides several key benefits, including lower trace metal background, smoother surface finish, easier pouring and superior sealing. Purillex bottles are used as by the pharmaceutical industry for storing and shipping bulk drugs prior to final packaging, as product packaging by high purity acid manufacturers and in many trace metals labs around the world. Design Features Compared with the traditional extrusion blow molding process used to manufacture all other PFA and FEP bottles, stretch blow molding produces a much smoother surface, resulting in more effective cleaning between uses and reduced risk of carryover of trace metals. Stretch blow molding also enables more accurate and precise molding of the bottle neck and threads for a more secure, leak-free seal. A full 2.5 turns of thread engagement gives Purillex bottles greater thread engagement than any other fluoropolymer bottle, and allows the large GL45 closure to be tightened more securely, which eliminates the need for a cap liner or a sealing insert and ensures long term seal integrity. The smooth, injection molded inner neck shape and the absence of burrs, flash or other molding imperfections on the lip of the bottle allow controllable, drip-free pouring – an important safety feature when dispensing concentrated acids.