Includes 3 delicious Flavor Refills compatible with your Cirkull water bottle. These flavor cartridges allows you to change your water flavor intensity with a unique dial located on the cartridge. Flavor Dial gives you full control of your delicious flavor; dial up or down as you please. Each Concentrated Flavor Cartridge can flavor around six 20oz fully flavored bottled beverages on a medium setting. Enjoy your flavored water with ZERO Sugar, ZERO Calories, and NO Artificial Flavoring when you use this water flavors. This water enhancer is a great alternative to sugary soda, juices, and other water flavor packets and powdered drink mix. Enjoy drinking water without feeling guilt, with this water enhancer. This truly is feel good hydration! No More Messy Drink Mix or Water Flavor Packets. The most convenient way to get your daily hydration, without dealing with the mess and hassle of stirring traditional drink mixes or water flavor packets. Simply insert the refill cartridge into your water bottle & lid (sold separately), choose your desired flavor strength, and you're ready to sip on your delicious single flavor or mixed fruit water! Easily switch between flavors by simply switching out the flavor cartridge in your water bottle. Whether you're in the gym for a workout, outdoors going for a run, or just at home. Drink more water easily with these convenient flavor cartridges.