The Germans are rightfully known for their masterful engineering capabilities. This 1986 video by the national army demonstrates this. It's in German, but you can follow what's going on even without a knowledge of the language.
The soldiers are deeply concerned that they will spill their beer while going into battle against Soviet invaders. Therefore, engineers developed gun mount stabilizers that are capable of holding glasses of beer perfectly still, even while traversing rough terrain. Panzer vor!