Airhorn with cap

thingiverse

Since no airhorn with a cap was available, I designed one myself. To do this, simply place a flexible item like a balloon on top and press the cap down firmly. It should fit snugly in place. Next, blow into the hole to produce a loud noise that will surely wake up your neighbors. I added a higher middle section to account for cases where the membrane is too soft. To enhance its effectiveness, I used a thin rubber glove on this part and was pleased with the resulting volume.