50% Off Colgate Teeth Whitening Pen

Score this Colgate Optic Teeth Whitening Pen, regularly $19.99, for $9.99 at Woot. Shipping is free when you log into your Prime account, or it adds $6 otherwise. All other stores are charging $10 more. This easy-to-use, enamel-safe whitening pen is perfect for nightly use. Simply apply a thin layer after brushing and before bed, then brush it off in the morning. Each pen provides up to 21 treatments, with noticeably whiter teeth in as little as seven days.