Capping Machines For Flammable Liquids Packing Machine It can be easy to overlook the fact that even hazardous chemicals and flammable products must be prepared for the end user by getting those liquids into the proper containers. Of course, packaging flammable liquids presents some unique challenges to packaging machinery manufacturers. While each packaging project will be handled based on the unique characteristics of the package, product and process itself, there are generally two common ways to package flammable liquids using an semi-automatic or automatic Capping Machine.