The file 'Balloon Shell Cat Bath Boat 3D Printer Model' is (stl) file type, size is 38.2KB.
The other bath boat designs I found on here are flawed, as over time most always ending up with water trapped inside, due to the porous nature of FDM. So I sketched and printed my own basic shell boat to avoid this eventuality.
I also attempted to rectify the issue inherent with these boats, where the balloons "wallowing" determines the direction of travel. So I angled the port towards the bow and sketched a rest to try and keep the balloon central, this helps the boat stay its course.
Works pretty well, my son seems happy with it and is now on his 3rd balloon with it.
Its designed to best suit a recipe of 3's:
0.3 layer height with 3 walls, 3 tops and 3 bottoms 30% infill.
No supports required.
Balloon_Cat1.stl | 114.1KB |