V29 Whistle - 118 dB - Best Survival Gadgets

The MakeItLoud V29 got its name because it is the 29th version I designed for this collection on Survival Gadgets.
 
It is a survival whistle that is a completely original design. I designed it to be rugged, easy to make and carry, have a great design and most importantly be very loud.
It is designed to be able to get you noticed in all conditions.

For ruggedness testing I spiked it into the pavement as hard as I could repeatedly. Then I ran it over with my car twice.
Finally left it in a glass of water for two hours to make sure that it would not sink and would drain and whistle immediately after taking it out.
It still whistles. For 3 bucks.