An adaptor for discriminating connection of an oral tip of a source of liquid enteral product to a feeding line. The aqueous detergent concentrate can be used in a cleaning liquid having exceptional soil, particularly grease removing properties with stable foam properties. Once the appropriate content publisher is found, the content publisher activates the content by presenting appropriate content publishing resources. In some embodiments, the guide catheter is sized to be inserted through a nostril of a human patient and used to guide the transnasal insertion of another device to a desired location within the nose, throat, ear or cranium of the subject.