Core Ice Cube Trays

The perfect combination of shaped and sized cubes, and the silicone material makes for easy extraction.  Just bend the form and push up from the bottom.  I have several other forms, but this one has relegated all those to the don't-bother pile.

https://www.amazon.com/Core-Kitchen-Silicone-Cube-Trays/dp/B01H9OHCFU