To maintain a healthy and productive enteral nutritional system, one must consider the actual product being placed into the machine. There are an abundance of formulas to compensate the needs of those with stomas and feeding pumps. These formulas are liquid so they can easily enter the digestive tract and be broken down for energy. Formulas include polymeric formulas (blenderized food and milk-based or lactose-free commercial formulas) and specialized formulas (hydrolyzed protein or amino acids formulas). Some patients prefer calorie dense formulas if they have volume sensitive stomachs. All orders over $99 receive FREE shipping. If you have any questions please feel free to contact us toll free at 877-977-7709, we are open Mon-Fri 9-5 EST.