Curly’s Caffeine Water provides natural caffeine from coffee beans. It includes 20 milligrams of caffeine in every bottle, which is the same as one-fourth of a cup of coffee or half a can of soda. Curly’s is also infused with electrolytes to help your body hydrate and recover more efficiently. With every sip, you naturally replenish cells, energy and mood. The water is sourced directly from a Texas aquifer then purified using reverse osmosis and UV light.