The Lifesystems Chlorine Droplets contains a 30ml purifier and a 30ml activator to treat up to 60 litres of water. It is easy to use, simply make sure the water is relatively clear before opening both bottles and adding 12 drops from each into one of the bottle caps. Leave the mixture to react for 10 minutes before tipping it into 1 litre of water and leaving to stand for a further 10 mintues. If the water is very cold, cloudy or if Giardia or Cryptosporidium is suspected, leave it for 30 minutes.Contains 30 Purifier and 30ml Activator - will treat up to 60 litres of water.Mix clip - securely holds bottles in place and allows for easy administration and measurementKills bacteria, viruses and cysts in water - including Giardia and Cryptosporidium.Leaves little after taste - pleasant to drink and safe for 2-3 days.Weight: 90g