Cirkul water is a great bottle 
I've never had it, what makes it so good? 
It is 0 Calories and 0 sugar and gives your water flavor, they have many flavors,from fruity, to teas, to coffees. 
What is your favorite flavor of Cirkul water?
Fruit punch, I tried the mocha coffee and it definitely wasn’t as good as it sounded! 
Can you make your own flavors with Cirkul water?
Unfortunately no. But there’s so many that I don’t think you’d need to! 
I heard they have a dial that allows you to pick a flavor, is that true? 
That is true! I usually stay around 2-3. Which will make the flavor last longer but some people like it around 4-5. The higher the dial the less the flavor will last. They usually last at least 6 fill ups. Usually more then 6 
Does it cost extra to do it, how is this different from powder?