FTIJPI Coffee Brew Adapter

Since the pandemic struck, I've been the only person in my office drinking coffee. Doesn't make sense to brew a whole pot when I only need to fill my travel mug, so I bought a single-serve brewer. Then I discovered that it wouldn't sit well on my mug, so I brewed into a smaller cup and dumped it into my mug. That was inefficient, so I cut the bottom out of that cup and just set it in my mug as a support. Then it hit me - print something! I started with a straight-walled version (yellow in the photos), but it was not as stable as I would like, making me think it was only a matter of time before I drenched myself in scalding-hot brewing coffee. So I took to Fusion 360 and designed this version with a straight inner wall and stepped outer wall. The initial stepped version (black in the photo with the yellow one) wasn't quite narrow enough for my mug, so I extended it to arrive at this design. Even with different mug sizes, one of the steps should fit relatively well. See the photo with th