A case for the USB programmer that I got for my ESP-01s. These can be really cheap from the bay, but IMHO, any electrical connected to a possibly expensive machine like a computer should be insulated...

Cover photo shows it with the ESP-01S mounted (care for orientation!)

CAUTION: the programmer I used need some additional switches to program the ESP-01(s)! So this thing will just turn the 'Programmer into a USB connection for using AT-commands.

I will add another thing, whenever the new USB programmers arrive (yes glueing HAS some disadvanteges ;-) )