Cartesian Diver Rocket!
thingiverse
Create Your Own Cartesian Diver to Print Yourself, It's Easy! Just Drop It in a Bottle and Watch! Print Settings: Printer Brand: Printrbot Printer Model: Printrbot Simple Metal Raft Options: Don't Worry About It! Supports: Not Needed at All! Infill Percentage: 15% for Optimal Performance Designing This Diver Was a Breeze! The hollow dome on top is key to keeping air trapped inside the diver.
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