<p>Scott Cooper talks about his invention, a sustainable tooth brush design. He is one of 10 contestants in the Innovation Factory's Lion's Lair competition </p>

Scott Cooper talks about his invention, a sustainable tooth brush design. He is one of 10 contestants in the Innovation Factory's Lion's Lair competition

<p>Scott Cooper talks about his invention, a sustainable tooth brush design. He is one of 10 contestants in the Innovation Factory's Lion's Lair competition&nbsp;</p>

Lion's Lair: Grin brush

Columnists and commentators on issues in the City of Hamilton, Ontario, Canada plus music, interviews and other stories from The Hamilton Spectator newspaper

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Lion's Lair: Grin brush

Lion's Lair: Grin brush