Making Water Filtration Simple Ceramics: A Natural Way to Filter Water Nectar uses some of the purest materials on Earth to create its ceramic water filters. The main ingredient is kieselguhr (also called diatomaceous earth), a natural, silica-rich sediment formed from ancient algae that settled at the bottom of lakes millions of years ago. The ceramic filters are made using advanced techniques, creating a hollow, porous structure that’s fired at over 1000°C. This makes the filter incredibly durable and chemically stable, so it can last a long time without losing its effectiveness. Nectar’s ceramic filters remove harmful particles from water while keeping the good stuff—like oxygen and natural minerals—intact. This ensures your water tastes fresh and clean, like it came straight from a spring. The filters are also highly effective at removing dangerous pathogens, including bacteria and parasites that cause diseases like cholera, typhus, E. coli, and more.