It’s pretty but when you exhale through it (doesn’t matter the intensity of the breath) there’s a whispy whistle sound. I tried a few different ways to place my lips/mouth on it but I have to actually think about the placement before I exhale to avoid the sound. It just doesn’t work the way I thought it would, in that I thought I would be having it around my neck and exhaling into it whenever I want. I’m going to return mine and it’s really frustrating that the cleaning kit can’t be returned even if it’s unopened. I really thought it was going to work but the whistling is annoying and even my dog is annoyed.