They are made from the same material as an Alien, the Harmony, and the 80feet bowl, and is 100% made in the USA with American materials. They conduct heat well.
You pack the bowl as high as the outer rim and leave breathing room for the holes. Then apply foil and poke holes.
These bowls hold anywhere from 20-25 grams of shisha depending on the brand and how you pack. With every hookah product there is a small learning curve and you will figure out how to bring it to its full potential.