Homemade soda water is a mixture of baking soda and cold boiled water or pure water. The method is as follows:

1, take a spoonful of baking soda and put it in an empty mineral water bottle.

2. Fill it with cold boiled water or purified water, dissolve it and shake it well before drinking. The soda water made by this method has a bitter taste. Add some sugar to dilute the bitterness of baking soda.