AMC Alkaline drops are an alkaline concentrate. 4 to 6 drops per 8 oz of makes drinking water alkaline and packs it full of powerful OH- alkaline ions. Ideal for traveling and dining out or for those unable to afford a water ionizer. They are unique and superior because they can maintain a strong alkaline pH in water long after other brand alkaline water drops fail. The 4 oz bottle will last one person about 3 months.