Keurig - For use with all Keurig single cup machines only For Best Taste - Helps prevent flavor transfer when switching between different flavored pods, a clean coffee machine ensures proper hygiene and produces better tasting coffee 5 Cleaning Pods - Use once a week or whenever changing between sweetened beverages and coffee and tea. For full machine maintenance and optimal taste, use regularly with single cup brewer descaling liquid No Vinegar Smell - Keeps coffee and tea tasting fresh Safe - Biodegradable, phosphate-free and odorless, removes coffee residue and rinse