A package closure system may include a package outlet including a first connection element and a cap configured to removably connect to the package outlet using the first connection element and comprising a second connection element. An overcap can be configured to removably connect to the cap using the second connection element. A method for providing a nutritional composition from a container to an enteral line may include: removing an overcap from a cap, the cap is configured to direct a nutritional composition through a channel within the cap, the cap removably connected to the container; connecting the cap sealingly to the enteral line; and applying a pressure to the container to direct the nutritional composition from the container through the channel and into the enteral line.