I put the Colgate Optic White Whitening pen to the test to see if it actually works!br Head to my blog for the before and after pics - br br Colgate Optic White Toothpaste and Whitening Pen. br Where to buy: Available nationwide at Woolworths, Coles and leading retailers, RRP $19.99.br br Colgate Optic White Facebook & Website: br br br br Independent product review paid for by Colgate. Colgate Optic pen results may vary. br The 5 most creative comments will win a free Colgate Optic Pen sample.