
Cut the top and bottom of it off, lay the metal out flat. (Cut the sheet in half to make future cutting easier.)

Cut a scrap of aluminum about 4/5ths of and inch by 2 inches. (Picture is 1" x 2", although that is WAY too thick, don't do it.

Cut that in half length-wise and then cut one of those pieces in half Width-wise. You can remove one of the small pieces.

Fold the long piece like a "P."


Take the small part and fit it over the flat part, fold the edges down.

To use, cover the sides with your finger and blow through the mouth-piece.