I got the Ninja Thirsti Drink System to get away from soft drinks but still get the carbonation I love. It came with an 8-pack of different flavors, all 0 calories and no sugar. Some of thee were for hydration, some with B vitamins and even one with caffeine for energy. The system is easily switched between still and low, medium, and high fizz. Drinks could be made in four different sizes. Flavor strengths can be set at classic or bold. Most often the bold was good but I would’ve preferred more with some of the flavors as it seemed weak to me. Unfortunately there are only the two settings. It is fun to combine two flavors. I’m currently drinking a combination of island mango and summer strawberry.