Toggle Button with Whistle

Hi, this is my fully functional toggle button with integrated whistle. Perfect for keeping your coat closed and making noise if you need to. It's very loud. If you are more talented than I am, you could even use it to create melodies, since the pitch of the sound can be changed by placing your finger at the hole on the back. The closer the finger is to the hole, the deeper the pitch of the sound. The further you put your finger away from it, the higher the pitch gets.Its dimensions are approx.:11 mm x 35 mm I hope you like it! :-) How do you print it?It consists of only one part and can easily be printed in around 40 minutes with no supports. I recommend a 0.12 mm layer height and using the orientation in which the model was designed.How do you use it?Slip it into the loop on your coat in order to close the coat. If you want to use the whistle, just blow into the elongated hole. Use your finger to cover the hole on the other end if you want to change the pitch. How do you sew it to