Elsan Blue Toilet Sachets Pack of 21Clean, safe and easy to use Sachets dissolve on contact with water Pre measured doses Clean, safe and easy to use, these sachets provide the ultimate in performance and reliability. Because each sachet contains an exact dose of concentrated powder, no measuring is required. As the sachet comes in contact with water it quickly dissolves, killing the bacteria and eliminating odours whilst imparting a pleasant fragrance.