Water purification is the process of removing undesirable / harmful chemicals, biological contaminants, suspended solids, and gases from water.
The goal is to produce water fit for human consumption.
Water filtering straws are designed to be used by one person (or more in emergencies) to filter water. Some models filter a maximum of 4000 liters of water, enough for one person for three years! They can also remove almost all of waterborne bacteria and parasites.
People in developing nations can use these items to survive in many cases that would otherwise mean sure death.
Don’t get caught without drinkable water!
Also, they can be used as a tool for survivalists and packed in emergency preparedness kits in addition to being used to help combat clean water scarcity worldwide. Personal Emergency Water Filters can provide clean water for a long, long time.