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This design was inspired by the story of 2 burmese fishermen who survived in a floating ice box for 25 days. The design features waves, keels, lights and a box that makes noises. The Ring, the wave and the windows can be 3D printed in separate files. Tolerances are included. An LED strip on the inside provides light. There is a passage for the cables through the two keels into the cube. Here is their story: https://www.theguardian.com/world/2009/jan/20/fishermen-survive-shark-infested-waters