Good case, quite hard silicone, but be careful it releases ice cubes of 5.5cm, it may not fit in the glass

Almost 3 years of frequent use.
The ice cubes come out easily once you find the way.
So far, it doesn't seem to have any problem/tearing, etc.
Very satisfied.

After 6 months of daily use, I can report 3 negatives:
1) Ice is difficult to remove.
2) In the past 2 weeks, 2 very small holes have opened, resulting in only 2 out of 4 ice trays functioning.
3) Due to the excessive effort, uniformity in the ice is rarely achieved

Quite soft silicone to easily release the ice cubes, and at the same time a stable material to hold the water before it freezes, without cracking. The ice cubes are large enough so that they do not melt too quickly.