Hydralyte Apple Blackcurrant Electrolyte Solution 1 Litre Convenient ready to drink solutions have the advantage that there is no error in mixing. 1 Litre bottles can last up to 1 month after opening in the refrigerator. Hydralyte Ready to use Electrolyte solution is suitable for the entire family, including babies, pregnant and breastfeeding mothers. TIP: When administering Hydralyte Ready to use Electrolyte solution to babies and infants, pour Hydralyte directly into a sterilised baby bottle or sippy cup. Alternatively, use a small dosage syringe to administer the solution directly into the mouth. Hydralyte may also be taken to help manage dehydration due to the loss of fluids through heavy sweating. This can be caused by a hot or dry environment, fever or strenuous exercise. Hydralyte helps to restore fluid lost as a result of the diuretic effect of alcohol and is best taken before you go to bed.