Instapure was the first ever tap water filter system, invented in 1975. Today, Instapure has a complete family of NSF tested and certified filtration systems including F2 ESSENTIALS for Chlorine Taste and Odor, F5 COMPLETE for the removal of 99.99% of microbial cysts including Giardia and Cryptosporidium and F8 ULTRA with maximum reduction of 53 contaminants. Instapure products are available in over 20 countries worldwide. Instapure systems are a great alternative to bottled water, to save money and reduce your personal carbon footprint.