Coffee YouTuber James Hoffman reviewed the 9Barista stovetop espresso machine.

Here's a half-section illustration from the  9Barista website so you can see what's going on. It has two boilers, a heat sink, a coiled heat exchanger, and a spring-loaded valve:

 

It's available from the 9Barista espresso website for $385. Read the rest

https://boingboing.net/2020/07/02/review-of-the-fantastically-co.html