These Super-Size Teeth Whitening Pens from Smileactives offer 40% more the amount of whitening gel compared to their original Advanced Teeth Whitening Pens. Experience fast, effective, and super-convenient teeth whitening. Just brush onto teeth and go -- no need for trays or strips. The sleek and chic design offers easy use anytime, anywhere. Now that's something to smile about! How do I use it: After taking off the cap, twist the opposite end until a small drop of gel is visible on the brush tip. For a new pen, several twists (20 to 30) will be required to break the seal and prime the brush. Apply a thin layer of the gel directly onto the front surfaces of the upper and lower teeth. Target areas of staining, and in between the teeth. Replace the cap to keep it fresh. Don't eat or drink anything for 20 minutes after application. Repeat this process two to four times throughout the day. From Smileactives.