Staying hydrated is essential. On-the-spot filtration is ideal anytime you can't or don't want to bring water with you. Grayl's GeoPress provides it. Combining electroadsorptive media, ion exchange, and ultra-powdered activated carbon, its filtration system removes 99.9% of waterborne pathogens like viruses, bacteria, and protozoan cysts, pesticides, chemicals, heavy metals, and microplastics. Each 8-second press provides 24 oz. of clean drinking water, and each replaceable purification cartridge lasts for 350 cycles, or 65 gallons.