Two-Stage Liquid Level Indicator

Adding cream to your coffee or milk to your tea has just become easier. Position the device on the edge of your cup or glass, so that the three prongs are inside the vessel, and start pouring. Once the liquid makes contact with the two outer prongs, the unit starts beeping to alert you that the liquid level is about 1 1/4 inches from the top of your vessel. You can now switch to pouring your second liquid. Once the liquid touches the middle shorter prong, the unit emits faster beeps to let you know that the liquid level is now about 3/4 inch from the top. The unit measures approximately 2 7/8 × 1 1/2 × 1 1/4 inches and features three prongs. It uses one 9V battery (included).