This is a replacement lever for the sodastream dynamo. It's intended to be a drop-in replacement of the original lever, but reinforced in the hope this one will not break :-)

Creality

Ender 3

No

Yes

0.16

20% Gyroid

I printed with Cura tree supports. Note that the actual button should be on top for better surface quality, even though this requires more supports.

I only saw after I was done that such a button exists already: https://www.thingiverse.com/thing:4110672 (from whom I stole the summary ;) )
Mine is a bit closer to the original in the interior shape, but that is probably irrelevant.

As my original button broke in a different place (namely wear and tear on the actual push-button, see third image of original part), I reinforced and lifted that part. It was convex-on-convex before, which doesn't seem to be a good design choice -- I made it a concave pusher against the convex button (see second image). Also, as the actual holders needed to be bent outwards quite a bit for assembly and disassembly, I made a "guide rail" to slide the part in, and I reinforced the holder with some diagonal struts (see second image).

Note that I created this in 2020, and only published it now, upon request from a hopeful user of the above-referenced thing. In particular the assembly stuff might be slightly useful.