This is a Bier sign which can be filled with RGB-LED Strips. it has also printable front windows which i printed in a transparent PLA. Its mostly selfexplaining but i will describe shortly how i did it.

First of All:
DONT FORGET TO MIRROR THE LETTERWINDOWS. They need to be Mirrored cause they will be flipped to be attached.

First print all the Letters, then the caps to close them while assembling the LED-stripe. I soldered multiple pieces together so the inside of all Letters has enough Led-stripes. begin with the first Letter and end with the last one. test the Led Stripe before you go to the next letter so you dont have to redo everything (did not happened to me...).
Take care of good ventilation while soldering and take care to disconnect the led strip after testing to prevent shorts.

Have fun while drawing attention to beer :)