You can make an inexpensive rehydration drink at home. But do not give this homemade drink to children younger than 12.

Measure all ingredients precisely. Small variations can make the drink less effective or even harmful. Mix the following:

• 1 quart (950 mL) water
• ½ teaspoon (2.5 g) baking soda
• ½ teaspoon (2.5 g) table salt
• ¼ teaspoon (1.25 g) salt substitute (potassium-based), such as Lite Salt or Morton Salt Substitute
• 2 tablespoons (30 g) sugar