Is there a single purpose device to listen to podcasts?

I really like the concept of single purpose devices. So instead of reading on the phone, I pick the e-ink eBook Reader and the distraction goes away.

So now I'm looking for a portable device to listen to podcasts.

- Small - Compatible with normal headphones and Bluetooth like AirPods - Some usefull user interface - I can subscribe to podcasts using RSS - so no need to manually upload files

Any ideas? Any projects to build something like that?