blk. ORIGINAL Alkaline pH 8.0+ For those who like it straight up! A smooth and refreshing blend of fulvic trace minerals, hydration and electrolytes. Our blend of trace minerals is what gives blk. its' distinct black color. With benefits for an active life and the purity of water, blk. is the next step in the evolution of water. Defy expectations with blk. Enjoy the Dark Side. Zero calories, sugars, caffeine, flavoring or dyes. Purified water infused with trace minerals. That’s it!