Floating Cup (smoother look, foolproof assembly)

This is a (still easier to print and assemble) improvement on the previous https://www.thingiverse.com/thing:3617536 . This and that previous submission are both remixes of HappyMoon's "Floating Cup Sculpture". [I've edited the files and summary a bit more (July 7, 2019), as I found that printing the 'stream' part of the sculpture can be difficult on some printers when printed high off the bed. And that actually, printing it sideways on the bed works and looks much better. July 19: rotated the "preferred" version of stream so that it can fit also on a 200mmx200mm bed] **[(May 6, 2020) I've also published a remix of this with different STLs for the stream and splash so that weight can be added to keep it balanced and to improve the glue bond between the stream and the cup. Get these files at https://www.thingiverse.com/thing:4342710 ]** I recently was printing one for my daughter, but managed to attach the "stream" backwards to the "splash", which made it lean the wrong way so it wouldn't stay standing up. So, this one uses a trapezoid-shaped pin (rather than 2 square pins), which both holds the parts together better and also prevents them being attached backwards. Other improvements are that the seam between the stream and the splash has been moved lower where it is even less likely to be noticed; and mass has been removed from the part of the "stream" that sits inside the cup to improve stability when the sculpture is standing up. Some tips I've figured out: **1)** Print the "stream" part with low infill (10% or even 5%) to minimize the weight of the thick off-center part that is inside the "cup". Be careful removing this part from the bed, since with low infill it won't be as strong -- don't try to pry it off by yanking on the long part of the stream! The "stream" part **will** need supports, no matter which orientation you choose. **2)** Print the "cup" part at low infill (5%) also and low number of perimeters for least weight. I us