You might look at the SodaStream Machine. It carbonates water. I add lemon juice to it. Very refreshing. You could add a couple of drops of stevia sweetener.... I used to, but I know like it with just the lemon juice. I also add apple cider vinegar to the water so I can get some of it down.... I like it with a sprinkle of cinnamon but others like it plain. I've seen the SodaStream machines at Target but they also have them at bed bath and beyond where you can use a 20% off coupon.......