Precision Hydration Electrolyte CapsulesThese blister packed capsules are ideal when you're relying on water from feed stations at events, if mixing up drinks during your longer activities isn't practical, or if you prefer plain water to even the mildest of sports drinks. They're also useful for topping up the electrolyte content of other drinks. 15 capsules per box, 250mg of sodium per capsule. Swallow with water.