This is self-remix of https://www.thingiverse.com/thing:6265188 .
I found that the ABS print was strong enough, so slimmed it down by cutting off excess parts.
The problem of the unstable center of gravity was solved by attaching sponge tape to the gap like the photo, allowing the iPhone to stand on its own without inserting a PET bottle.
MagSafe_Cup_Holder_ver2.stl | 732.8KB |