I believe Pepsi one was put on the market only to outdo sales of other brands. One calorie makes no sense either diet wise or for that One lone person that wants to get a calorie to add to their diet for the day. More products by one company take space on shelves and when they hope to run out of diet, then they hope you will buy Pepsi one. So now I have to write more because reviews cannot be under 150 words, but there is no more to say period. I still need more words, but this too is pointless, nothing more to say!!! Don’t buy this drink unless they run out of Diet Pepsi, and Do buy this drink if you don’t care one way or another!!!! Pepsi does not care, they will make money even though phosphoric acid rots your teeth, causes kidney problems, and can even be used to clean a dirty engine or oil clothes that mechanics wear. Phosphoric acid Pepsi One can also be used to clean a dirty toilet!!!