Abstract: A portable container (2) for purifying drinking water (4), which container (2) comprises a body portion (6) for containing the drinking water (4), a handle (8) for lifting the container (2) for water pouring and water re-filling purposes, an ozone generator (10) for generating ozone from air, an air pump (12) for delivering air to the ozone generator (10) in order to produce a mixture of air and ozone and for delivering the mixture of air and ozone to the drinking water (4) in the body portion (6), and a filter (14) for the drinking water (4), and the container (2) being such that the mixture of air and ozone delivered to the drinking water (4) in the body portion (6) causes the drinking water (4) and the mixture of air and ozone continuously to pass through the filter (14) whereby the filter (14) filters the drinking water (4), and the ozone purifies both the water and the filter means (14).