Mini conch whistle

一个迷你海螺哨子，经过我的调试，它可以吹得很响亮，可以做成一个钥匙扣，如果你不想要孔，你可以把那个负零件删除后打印A mini conch whistle, after my debugging, it can be blown very loudly, it can be made into a keychain, if you don't want the hole, you can print it after removing that negative part