Thomann Crystal Singing Bowl CCC 7,5"

I bought these clear crystal bowls for test, since I have been happy with Thomas Tibetan bowl series. These came well packaged with really sturdy travel case. Tone F is from 3rd octave if anyone is interested. Bowls were also beautiful looking. Sound with even slight touch is sharp and clear, more my taste than regular crystal bowl. However all of these bowls are extremely thin. Thickness is barely 2mm, which is really little. Also this biggest bowl weights only 600 grams. Compared it to same size + note Meinl clear crystal bowl, this is only half of that weight. I'm really hesitant it to keep these or not, I really like to look and sound of them, but they are so fragile that I'm afraid to use them.