well, a sisve in the drain would save used balls to be used again. It would also catch chicken wings or gristle. That means some care is needed. The balls can a

well, a sisve in the drain would save used balls to be used again. It would also catch chicken wings or gristle. That means some care is needed. The balls can also have a magnetic core for the same reason - a magnet would save balls. Most chicken wings are not magnetic. A sieve is 100% good - catches all balls. Bad aspect is big stuff is also caught. A magnet is not 100% good as a ball trapped in a chicken wing might be an aggregate too heavy for the magnet to grab, so the ball and wing go down the drain.