Blanc GOLD ‘on-the-go’ teeth whitening pens Each pen contains enough 6% HP gel for 30-days. - Screw cap top. - Twist to operate - Built-in applicator brush. - Stabilised for temperatures up to 22deg – Ideal for hand-bag use Using the pen; brush on Blanc for 2-3 minutes immediately after meals or staining drinks to help maintain your whitest smile.