November 11, 2022
Description
I was looking for a keychain that looked like the starbucks tumbler. I found one that looked ok, but the through hole for mounting to a keychain was just all wrong.
So I created this model from scratch in Blender. Its a cylinder that is shrunk at one end, then given a knurled effect as seen in this youtube video.
After that, I added a horizontal cylinder that has a round cut for the face. I tried printing the straw and cup as one model, but it is very fragile and kept breaking off. So i separated the the straw and left a hole in the cup. After they are printed, just a drop or two of crazy glue to the hole in the cup and insert the straw.
You can also print the cup and straw completely separately to get a different color for each. I included 3 stl files (cup and straw, cup only and straw only).
The keychain is just a pack of 50 I got from a random Amazon seller. It uses an 8mm jump ring to attach the cup to the chain part of the keychain. A jump ring is an open ring that you bend back together with 2 small pliers.
And as milano stated below, you absolutely want to print this model upside-down. Its the biggest benefit to having the straw print separately.
I made the hole in the probably a little too big. As Flashesbuck stated in the comments, you can print the straw by itself a few times (adjusting the xy scaling) to dial in the tube diameter that is appropriate for your printer's tolerances and your slicer settings.
License:
Creative Commons — Attribution — Noncommercial — Share Alike