Start with 1 liter of filtered or distilled water in a clean bottle or pitcher.
Add 1/8 tsp of baking sodium.
Add 1/8 tsp of potassium chloride powder.
Add 1/8 tsp of magnesium malate powder.
Add 1/8 tsp of calcium citrate powder.
Stir until all the minerals are dissolved.
Optional: To make it sparkling add a splash of carbonated water (2 parts water to 1 part sparkling water) or use a home carbonation system like a SodaStream.