Haven't been posting much coding stuff this past week as I've found it difficult to focus on it given the state of things in my country 
But... I have a new article out!
Using Container Query Units Relative to an Outer Container https://frontendmasters.com/blog/using-container-query-units-relative-to-an-outer-container/
Sparked by a question @mattwilcox asked here.
frontendmasters.comUsing Container Query Units Relative to an Outer Container – Frontend Masters BlogContainer units (e.g. cqi) are only able to reference the closest container. But if you register a custom property and set that higher up, you can get your hands on other containers units.