Willow Water Sparkling Water Standard Cap 500ml. Willow Water is not only an exceptionally refreshing & smooth tasting water, its unique & pure formulation helps to freshen the complexion & aid the achievement of naturally beautiful skin. Calcium. 113mg/litre. Naturally salicin. The Secret is its source. Contains Calcium & Salicin naturally. Lakeland Willow Spring rises where once vast forests of white willow grew in the heart of the Lake District. It is unique in that it contains Salicin as well as valuable levels of Calcium naturally. Drinking 2 litres of Willow will provide well over a quarter of the recommended daily allowance of around 800mg of Calcium within a healthy diet. Enjoy this thirst quenching sweet tasting water every day for perfect refreshment.