BOKKRALL gravity-fed water filter system could be present in lakes, rivers, ponds, streams and other freshwater sources—no electricity, tools, or plumbing are required. The Gravity-Fed Water Filter System provides clean, refreshing potable water while camping, hiking, fishing, RVing, off-grid living and in emergencies, disaster preparedness and recovery scenarios.The portable BOKKRALL System effortlessly filters water for about 1 people each day. 1L of small capacity, lightweight design, moderate volume, easy to carry, packing size ONLY 3.5"L x 3.5"W x 8"H, BOKKRALL gravity-fed water filter system have unique shape design attract more attention,it will bring freshness,adorn our lives.