Drink clean water from any water source with this filtered water bottle. Double wall vacuum insulation helps keep water cool for hours. Covered mouthpiece protects from germs. 2-Stage filtration - carbon filter + membrane microfilter. Carbon filter reduces chlorine odors + organic chemical matter. Membrane microfilter protects against bacteria parasites microplastic dirt and more. Carbon filter lasts up to 26 gallons (100-liters). Membrane microfilter lasts up to 1000 gallons (4000-liters). Saves on single use plastic water bottles. 1L/34oz Capacity.