The Smile Direct Club Bright On Teeth Whitening Pens contain the same enamel-safe whitening agent used by dentists – for less than half the cost. The no-mess brush applicator lets you paint the gel directly onto your teeth. Use for just a week – once in the morning and once in the evening – and enjoy whiter teeth for 6 months. Then rinse and repeat 6 months from now because you get 2 full treatments (a year's supply total). Start now, and get ready to show off your best, brightest smile.