The part of a device for smoking marijuana that hold the weed itself.
The pipe itself is NOT called a bowl. That is a common mistake; stop making it. Call it a pipe or a glass piece, but don't call the whole device a bowl around anyone who knows anything if you don't want to look stupid.
Dude, let's pack a bowl.
Dude, let's smoke a bowl.
I don't want to smoke too much, just pack a light bowl.
Give me the bong, you always pack the bowl too loose.