
I have no issues with cork quality and Hammer finish/design. I just wish they were a little bigger. They are very small for me as I thought they were much larger based on the product image on the website (but you can never tell the size from the image). They have to be put in a glass ashtray and hit the hammer sharply with the edge of the tube (or that's how I saw it on YouTube?). But I wanted to use mine by hand, in reverse, and hit the whistle with a hammer. But because it's so small, it's difficult to land a punch good enough to dislodge any stubborn remnants of your last bowl. It does a reasonably decent job though, so I'll keep using it. And one day maybe I'll find a glass ashtray to stick them in and use them properly (although I'm sure there's no right or wrong way to use them). how to use them Or heck, you can do whatever you want with them. it is not a missile operation and there is no police traffic.

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