But what if the ship were full sized? It would be built without tweezers and such by human workers inside the bottle. And that's when the gears clicked into place.
As I've reiterated many times, Roboshrub Incorporated is dedicated to taking unfeasible ideas and following them to their natural extensions. It's been a while since a restaurant caught my attention, the last one having been a converted ship in Mexico, attached to a dock with the floor missing in a section, revealing a pen full of wild sharks. It served seafood. So I begin thinking, and my train of thought goes something like this:
What if a full size ship were afloat, anchored down, in just over 20 feet of seawater. An authentic ship, made from good old wood and steel, in authentic salt water with local marine life. Not only that, but all of this is inside a giant glass bottle, submerged at least partially underwater and tilted upwards, so that the mouth is just above the surface. Fresh water would be pumped in biweekly.
The only problems I can forsee are thus:
1) The cost and sheer inconvenience involved in moving that much glass. Perhaps a high-density plastic could be used instead.
2) The size of the entire apparatus: it needs to contain enough water to displace the ship. The fact that it is salt water will help; the solution is more dense than freshwater.
3) Safety regulations.