Half a lemon, 1 tablespoon of sugar, 1.5g of baking soda and water.
1, take a lemon, cut off two to three thin slices into the cup, the remaining with plastic wrap to collect, save for next time.
2, take a spoonful of sugar to add to the water cup, lemon is very sour, with sugar to adjust the taste, make it sweet and sour. Honey white sugar can be adjusted according to their own taste.
3, 1.5 grams or so of baking soda. Baking soda decomposes to produce water and carbon dioxide, so that the cup is filled with carbon dioxide, which is the mystery of the soda.
4, and then pour in the right amount of cool white water.
5, after stirring, immediately cover the lid, do not let the carbon dioxide run out.
6, when the bubbles are produced, you can drink. Homemade soda is ready.