About sis go hydro caffeine sis go hydro caffeine builds upon the scientifically based formulation of sis go hydro by ensuring you are effectively hydrated for performance whilst also providing 75 mg of caffeine per tablet as an effervescent tablet that readily dissolves in plain water it represents a highly practical approach simply drop one tablet in your 500 ml water bottle to ensure that all of your electrolyte fluid and caffeine requirements are met in its most simple format the a