This is my entry for the MakeItFloat contest. This was my first big project so there might be some printing mistakes or other things that could be done better.
I based my boat on the Maersk container ships and I made working containers in a stack of 2x3 (they would be too big on their own) that you can open and put coins and stuff in. The deck is magnetically attached to the hull and is easily removable. There is room in the hull for storage or whatever else you want to put because I suppose you could make it Rc with some mods or turn it into a "pop pop" boat like those other entries. I don't know, the point is I worked hard on this. You could even probably print a mini version of the entire boat so you don't have to assemble anything. The full boat is attached if you want to try to make it in one shot. Right now it is just a pretty cool design that I made that is a platform for anyone who wants to turn it into something really cool.
It can hold a good amount of weight and if you're wondering why I'm using bolts, it's because I didn't have any coins.
Size:
108.6W x 380.92L x 145.01H mm

If you want to use readjust anything on here, just search for MakeItFloat container ship on Tinkercad. Or 2x3 shipping crates. If you don't use Tinkercad, I'm sorry but it's the only design program i know how to use and it's pretty easy if you don't know how.
Here:
https://www.tinkercad.com/search/?q=makeitfloat+container+ship
https://www.tinkercad.com/search/?q=2x3+shipping+crates

I worked really hard on this. If you have any questions just ask. Ill be here waiting for people to hopefully like this project.
Thanks for looking!

I split the boat up into pieces which is what the downloads are.
There is:
front hull
back hull
front deck
back deck
bridge
front pole
2x3 shipping crates (you can make as many as you would like)

I used hot glue to attach all the pieces but to attach the deck to the hull I drilled 1/8 inch holes into the hull and glued in magnets, then did the same to the deck.(be careful with this)
Here are my settings from when I printed everything (which was on an Ultimaker 2:
layer height: .2
For everything but the hull I used 1.2 shell thickness and bottom/top thickness.
For the hull I used 1.6 to make it stronger.
(you should probably adjust those settings to make it more water tight, it was my first time making 3d stuff so i didn't really know and the hull leaked a lot)
Lastly, I coated the hull in clear aquarium sealant to make it water resistant but you can use any sort of sealant to do this. (probably wasn't smart to use this stuff but it was all I had, I would recommend something better if you decide to make it but it gets the job done. You also might not even have to do this if you print the hull with thinner tighter layers)