Use a thermos to drink or drink directly.

1. Use a thermos bottle to make drinks: wash out 50 grams of saponaria beans, put them into a thermos bottle, add boiling water, put the stopper on the bottle, and add sugar after three hours.

2. Drink directly: Take 10 grams of saponins, wash them out, put them into a teacup or thermos cup, soak them in boiling water and drink. After the saponins are cooked, remove the red skin and eat them directly.