We decided to make another crazy copter. This time we just used ordinary tap water and a freezer to build the frame. To be honest we did not expected it to work. It literally took us hundred attempts to get a complete ice frame which did not break during freezing or was misused by a thirsty roommate to cool his drink ;-) But in the end, we could get it to fly

At least for a few minutes. Then the motor mounts started to cut off their own arms. So, you can called it a suicide copter too :-D