Molekular keyboard, likely Nilon printed
This project is a framework to allow you to build lots of different keyboards. However the base model looks really good. Project 
ZMK has bluetooth support.
You can sculpt keycaps using PseudoMakeMeKeyCapProfiles. Project
I'm interested in trying low profile keycaps. Kailh Black Cloud is a tactile low profile switch which sounds pretty nice. Youtube Kailhswitch.net
TTC Low Profile Brown Switches looks like they actuate at 1.2mm which is similar to Kailh Copper.