Before purchasing id idli dosa batter I was experimenting with other dosa batters which are available in market. The problem with all those batters was heavy use of preservatives may be to increase shelf life. So dosas wiuld become sour the day I purchased batter itself.We never liked sour tasting dosas anytime.My exlerience with id dosa batter is fabulous. Dosas tastes like homemade freshly ground dosa batter.I am very happy that now I can buy this batter which has no preservatives, stock comes daily in the market.The most important it doesnt become sour after three days also.