Zero Hydration (single tube) Tropical High 5 Zero Hydration (single tube) Low Carb, Anti Cramp, + MagnesiumDrop a fizzy tablet of Zero into your drink bottle. It makes a great tasting carbohydrate and sugar free drink packed with electrolytes to provide optimal hydration and help prevent cramp.1 tube makes 10 litres (1 tablet = 1 500ml serving) The X'treme flavours contain Caffeine. ZERO X'treme is easy to use, drop a tablet in your bottle and it quickly dissolves in water to give you a delicious, refreshing, advanced electrolyte drink with added magnesium and stimulants.