About this 3D model

The Tantalus cup works normally if it is partially filled. If filled to the brim most of the liquid siphons out through the bottom. It is also called a Pythagorean cup. Thing:17330 by Scooter46290 is a such a cup with a simple but elegant siphon composed of three concentric cones about a central tube. Here is another version where the siphon is concealed in the stem. It has the advantage that the siphon has a greater head and can more completely empty the cup. Open scad and stl files are provided.