A derivative of my previous project. Super small and super effective ;D ONLY 1 tiny bridge! ;D
Print in 0.2mm layer height and 100% infill for best results :D Oh, and make sure your lips complete the seal around the entrance or else air will leak producing no whistle just fyi ;D it is tiny after all xP
MAKE SURE YOUR PRINTER HAS THIN WALLS PRINTING as this is designed 1.2mm all around meaning a 3 perimeter print of a 0.4mm nozzle.
1-Takes about 7 minutes to print one
2-ONE tiny bridge
3-No support material necessary
Side note: STICK TO ORIGINAL SCALING! I printed this thing in 2x scale as well and it did not work (although it looked really awesome xD).