IKEA Nymane (NYMÅNE) lamp diffuser cup

Overall a nice and simple design (would have preferred rounded edges though for a more uniform light). I have two lamps and the diameter of the whole on one of them was a bit smaller, so had to adjust the size a bit. The other one fit perfectly without any adjustments.

The idea is great. Exactly what I'm looking for BUT in the implementation is off. The wall of the insert is way, way, way too thin. It's broken multiple times with the slightest touch. It's single-wall in thinness. It also doesn't seat deep enough inside the recess of the lamp and there is nothing to hold it all together. This is essentially a prop version of a real product that should be redesigned. It's so close. It needs rounded over corners and greater internate support/strength to be useable.