Form, fill, and seal machines complete the packaging, filling, and sealing in one continuous process and eliminate the need for three separate machines. Most form, fill and seal systems use flexible films to form the primary package. Vertical machines are simpler and faster whereas horizontal systems are better suited to the packaging of solid products that do not flow well. Form, fill, and seal machines are widely used in the food industry for packaging snack foods, powdered products, liquids, and pastes and in the pharmaceutical industry for the production of IV bags, powder sachets, and stick packs.