A socket mounted phone holder, goes as a sleeve on most chargers (tested with Xiaomi, Samsung and one offbrand). Made for the EU type F “Schuko” socket.
Print it vertically on the side as shown in the pictures and it will print without supports.
Printed with PLA, 0.12 (fine) setting and 25% infill, it could probably print with less infill as the thicker part is really sturdy. Printing time ~2h 35min.
The author hasn't provided the model origin yet.