Busy gardeners love the Plant Sitter system. It delivers water to your plants based on the soil’s dryness. Each Plant Sitter includes a small water tank that hangs on the side of your pot, and one 4-1/4in H x 1-1/2in dia ceramic cone with 18-1/2in siphon tube. Additional cones with watering tubes are also available separately.Water tank is 8 inches across and 6 inches high.
I guess this private and two officers have seen a lot of action.