This is one of my more ambitious projects. I’m all about Bambu Lab now, but I actually printed this on my Ender 3.
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Pass on your choice of flavors but I like the work. 
Where might those interested find this masterpiece model?
I would be happy to share but I’ve always been confused about how that works. Here’s what I mean: If I print two short sleeves, and then print a coupler to join the two together, what happens if the next guy has a problem with fitment. I’ve wondered about that for a long time. I mean, if I shared the Fusion 360 file, they could tweak it. But even then-- maybe that person doesn’t know how to use CAD. How does that work?
I just thought you found it on one of the maker sites. 
Use tolerances when make models and just share them with all the info/profile needed to print it correctly. If they fit for you 98% will fit others too. The 2% remaining are people didn’t follow the print profile/suggestion or used different filament.
I usually use between 0.1 and 0.2 for tolerances it depends by the model and the fit needed (more or less tight)
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Starting with a print profile as generic as possible, if you can get that to work it’ll please the masses. I make sure any required settings are in the profile and noted, I try to do prints on my Mini these days as this is a good baseline as other Bambu’s would be capable of that or better.
As @michelem noted with the scale works, good way is to slice that joint and experiment with a few tolerances.
If you design everything for an Ender3, for example, so that it is dimensionally accurate after printing on your own Ender3 and the tolerances for assembly fit, it will probably only do so to a limited extent on another printer. The question is whether the design is such that small differences in gap dimensions (tolerances) do not matter on different printers with different filaments.
Best regards!
“If they fit for you 98% will fit others too.”
Well, that’s good to hear. I’ve always wanted to share (or possibly sell) my designs and that’s been holding me up. Would it be inappropriate for me to start feeding the files to this forum little by little? Or, do I need to post it on Makers World? It’s been several years since I printed it and I’ll have to dig through my folders. The project has been quite a hit at my house when we have guests. The average person cannot imagine how a roll of filament becomes a K-cup dispenser.
I’m going to do that right now. I’m retired with nothing better to do. One thing I’ve never figured out is how to get more than one file on my built plate at one time. I’m not talking about duplicates. I know how to do that, but I haven’t figured out how to get Fusion 360 to let me send more than one body file to the print bed at one time. Any one?
Have you tried dragging the STL/Step file created by Fusion onto the build plate? That’s what I do. You can add as many files as you want.
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I would strongly suggest to publish them on MW then you could share your thoughts here. But be sure to publish also a Bambu Studio profile for them.
I haven’t figured out how to get Fusion 360 to let me send more than one body file to the print bed at one time. Any one?
There isn’t a way, I send them one by one, or better, I save them one by one and then import in BambuStudio
“Have you tried dragging the STL/Step file created by Fusion onto the build plate? That’s what I do. You can add as many files as you want.”
Really? That’s too simple. Thanks. I’ll give that a try.
Okay, I guess I should do it right and go through Maker’s World. I’ll have to figure out how to do it. Between now and then though, here’s a couple of files for anyone who wants to play along at home. It’s the base for the tube and a short section of tube that I cut off in F360. At the time I built this thing, I knew nothing about filaments except that it was black PLA from Amazon. I didn’t know anything about settings. I figured all my clearances by trial and error. I wanted it to be tight.
Bummer. It won’t let me upload an STL file.
I’ll see if I can figure out how to put them in DropBox.
https://www.dropbox.com/scl/fi/db3fbi34773tuzmafp5ye/bot-tube-sectiion-for-test-print.stl?rlkey=dwdeffngs8wuej29dhnulzlsp&st=6fk6t0ju&dl=0
Here’s a couple of print files I did with the only filament in the house. It’s a generic PLA marble and I printed them on my P1S. As much as I like the P1S, I’m just as likely to print on my A1 Mini. I really love that machine. The two pieces snapped together perfectly.
All you have to do is Import all the separate files to your build plate. If you don’t have Fusion open to each file as @JonRaymond states, just use Include. That’s how I created the print file for the dispenser I printed. Each piece was a separate file in the pic below. Use Auto Arrange after including the files if you’re not comfortable placing the parts.
Here’s the optional top segments for the model above. You can print as many mid-segments as you want. The parts link together with the pins. I now have two of these models on my cabinet. One holds my coffee and the other holds my Swiss Miss hot chocolate cups. 
What kind of dispenser is that? It looks a lot like mine. Very cool! Fusion only lets me select one body at a time. I guess maybe your exporting them as STL files and then dragging them into BS from your desktop. Yes? No?
Very nice! Is it on Maker’s World? Has anyone else printed it?
Yes, sort of. The files were supplied as STLs. I opened the first one in Bambu Studio then “Imported” the others one at a time to build the plate. The model is on Thingverse under Jdalycashe located here.
I haven’t posted my make yet.
Perhaps yours’s looks like his? His files are from nearly four years ago. 
Really though, how many ways can a K-cup dispenser look. I know I searched high and low and finally settled on the one above. It fit my needs the best.
Edit: I initially found this holder on Maker World and printed the 2-up base. This is the one that lead me to the dispenser. I had mine in the base (without the second-color brand name) on the counter but found it too unstable and hard to make room for. I ended up attaching mine directly to an upper cabinet with double sided tape.
“…on Thingiverse”. Oh, okay, I thought it was your design.