Heyrex Torus Self-Filling Pet Water Bowl for Dogs, 2 Liter Fresh and cool filtered water for your dog or cat King-size half-gallon capacity (2 liters), plus 5 bonus filters giving you a total 6 months of clean pet water Travel-friendly, take your Torus water bowl anywhere Less splash mess because it maintains a low water level Solid construction, doesn't tip over and requires no batteries or electricity. Water is gravity fed Fresh and cool filtered water for your dog or cat King-size half-gallon capacity (2 liters) Travel-friendly, take your Torus water bowl anywhere Less splash mess because it maintains a low water level Solid construction, doesn&#039;t tip over and requires no batteries or electricity Water is gravity fed Large half-gallon water capacity (2 liters) Auto-replenishes Filters water Water fill, flow and lock options Travel friendly Stored water protection No mess, no spill or splashes Ergonomic design Made from food-grade materials Easy to clean Comes with a 6 Pack Filter