This is an upgraded version of a K-cup dispenser we've been using for a couple of years. The older one worked great, but this one's much better.

Note that both STL and 3MF files are available including some test files. You can use the test files to print parts for testing fit of joints.

No supports are required assuming you print everything in the proper orientation. The tubes should be printed with the point of the teardrop shaped window facing upward.

I used SUNLU brand standard PLA. I had never used it before and I don't know of anything special about it. So you can probably use anything you like.

My temps were 220/55 for all layers.

I currently print with the Bambu Lab PS1 and the A1 Mini with textured PEI plates. I used the PS1 for this project, and I used mostly default settings. I did increase the quality setting from 0.20mm Standard to 0.16mm High Quality because I was in no hurry and thought the print would be better. I'm happy with the result.

As the tubes are the most likely thing to fail by falling over, I have set a brim for them and placed them on individual plates.

I suggest you print the test files to make sure that everything fits using your printer. 

I purposely made the joints tight. Glue is optional but you might want to use a drop or two (I didn't). I actually used a hammer and a block of wood to tap the parts together.

The finished product will be 368mm (about fourteen inches) tall and about 12 inches wide. Each tube holds 8 K-Cups.

I used six #8 x 1/2" flathead screws to fasten the dispenser to the plywood that encloses my refrigerator. If you're going to hang it on a wall, you'll need longer screws and wall anchors.

FLAVOR BADGE CUP PROCEDURE:

I used a clear plastic produce container and scissors to make some lenses.

Hold the lens template against the lens material and trim around it with scissors (one for each flavor).

With an X-Acto knife, cut the labels off of the four used K-cups you intend to stock.

Press the cups onto the square projections on the mid-section frame. This is a very tight fit.

Press the labels into the cups flattening them so you don't see the puncture. Press the lens over the label.

Then press in a badge lens retainer ring to hold the lens in place. (The rings can be pried out later with a pocket knife to change flavor labels.)

FYI: The mid-section frame and top-section frame use the same joint plate. 

Printing the teardrop shaped holes may leave some excess plastic inside the tube. I used a pocket knife to scrape it away where necessary so the K-cups wouldn't snag on it. It doesn't have to be perfect.

ASSEMBLY:

Join the three frames together with the joint plates. The top and mid-section frame use the short joint plates. You may have to tap them together with a hammer and block of wood.

After the base-section halves have been joined together, push the lower tubes in place. It's a pretty tight fit and you may want to remove and replace them a few times to make sure they are properly seated. Don't worry too much about alignment as the mid-section frame will pull it all together.

Attach the mid-section frame onto the lower tubes making sure the splines on the tubes line up with the slots in the mid-section frame. Some light tapping with a hammer and block of wood brings it all together.

Now insert the upper tubes into the top-section frame (not the mid-section frame). Each upper tube has one spline and the top-section frame has one slot per hole.

Now insert the upper tubes into the mid-section frame.

Attach the dispenser and fill it up with beverages of your choice.