A liquid dispenser is described, having a tank configured to deliver and present a liquid in a drink basin within a tray base. The liquid may be a liquid bait for population control of small animals. To reduce evaporation and liquid waste, the tray base may be partially covered by a tray top. A spill basin may surround the drink basin, and may be configured so that tilting or inverting the liquid dispenser drains a liquid from the spill basin and drink basin back into the tank.