A 40-pack of Kirkland Signature Purified Water bottles is shown, with each bottle containing 500ml (16.9 fl oz) of purified water with added minerals for taste. The label indicates the total volume of the pack is 20L (676 fl oz). The water is purified and contains minerals such as potassium bicarbonate, sodium bicarbonate, calcium citrate, sodium chloride, and magnesium oxide. Kirkland Signature water is produced by Niagara Bottling. Mineral content in water is generally considered beneficial for health.