This is a case for the RZLblink soldering kit.
The blink is basicly a USB controlled RGB LED.
It's a clone of the ThingM kickstarter Project called blink1, therefore it is compatible to the blink1 firmware and tool stack.
Pro Tip: Print it upwards ;-)
Just print it upright, with a layer height of 0.2mm the print takes ~ 30min and will weight about 2g.