Survivor Filter PRO – Virus and Heavy Metal Tested 0.01 Micron Portable Water Filter for Camping, Hiking and Emergency. 3 Stages - 2 Cleanable 100,000L UF Membranes and a Carbon Filter. https://www.amazon.com/dp/B00QFXGSIY/ref=cm_sw_r_cp_api_.k5TBbX17H8ZD

Also go to Charities (in the sidebar) ---> Ukraine Aid Ops ---> Donate ---> Amazon links - to see other items being requested. Note the need for Lifestraw water purification straws, and water purification tablets, water purification kits. Kneepads. Heavy gloves. Individual first-aid kits (IFAK). Camouflage rain jacket. Duct tape. Body wipes. Hydration packs. Safety glasses, to protect vision from shrapnel. Winter sleeping bag. Thermal underwear. HIKING socks (not cotton).