Buy 100% Naturally Alkaline Water Online at best price. Aava water is naturally healthy and hydrating and also packed in 200ml, 250ml, 500ml, 750ml, & 1 ltr PET and glass bottles. Alkaline water has a pH of 8 or 9. However, pH alone isn’t enough to impart substantial alkalinity to water. Alkaline water must also contain alkaline natural minerals such as calcium, magnesium and potassium like Aava does.