Commuters and tourists at Westminster and Tower Piers can remain hydrated and cool thanks to machines that offer free chilled water to the public. As long as you bring you own water bottle or purchase a reusable flask at the station, you can fill your container with up to 500ml of clean, cool water. There are plans to expand these machines to London if there is enough interest. For more on these machines, click here:: Free drinking water machines at Westminster and Tower Piers… and they could be rolled out across London