Canteen of Denial

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This is a clever trick canteen designed to withhold water when tilted back to pour. The design relies on printed bearings and weight distribution around the center of gravity to keep the inner container upright. To build this trick canteen, you will need the following parts: 1. Inner Container.stl (1) - This part must be watertight to function correctly. 2. Cap.stl (1) 3. Inner Plug.stl (1) 4. Outer Shell Half A.stl (1) 5. Outer Shell Half B.stl (1) - Note that halves A and B are distinct parts, requiring one of each, not two identical ones. 6. Bearings (2) 7. Rubber Bands (3+) Assembly: First, print the required parts, paying attention to supports for the Inner Container and Outer Shells only. Remove all supports carefully using a medium-grit sandpaper if necessary. Next, thread the Inner Plug into the Cap and slide the Bearings onto the center pegs of the Outer Shells. Then, place the Inner Container onto one Bearing, ensuring it rotates freely in line with the Outer Shell. After that, insert the other Bearing and Outer Shell into the Inner Container, mirroring the assembly while making sure the tabs align properly by sliding them together. Finally, secure the protruding tabs of the Outer Shells using Rubber Bands, then screw the Cap into place to complete your Trick Canteen of Denial. When someone attempts to drink from this canteen normally, the inner container will remain upright, preventing any water from being consumed. To drink from it successfully, one must be aware of a crucial secret: The cap, when fully screwed in, extends downward just enough to prevent the inner container from tilting. However, upon closer inspection, you'll discover that the Cap is actually hollow and contains a threaded insert that can be unscrewed clockwise. This removal will create an accessible drinking channel with the Inner Container held securely in place by the cap.