The specially-sized bowls for the Freeze Pipe hand pipe. They include a gasket to seal the bowl to the pipe securely.
Honeycomb bowls promote better air-flow and function by keeping debris from getting sucked into the piece. Because of this protective nature, these bowls also work wonders at keeping the piece cleaner for longer.
Overtime the bowl will become dirty and need to be cleaned. We recommend investing in a paperclip to clean leftover ash from the bowl. Simply poke it through the holes of the bowl and you're good to go!