Excerpt: We’ve tested several whitening pens, but the Teeth Whitening Pen (4 Count) genuinely stood out for its convenience and effectiveness. Our favorite feature? The no sensitivity formula, which simplified the whitening process without discomfort—something we appreciated. The carbamide peroxide gel worked quickly, restoring brightness to ours, though we noted the travel-friendly size was particularly appealing. The pens felt sturdy enough to toss in our carry-on, eliminating bulky tubes. While some brands wore off within a few days, ours still showed visible results after a single use. The 4-count pack was cost-efficient, too, which added to our satisfaction. Honestly, it’s a brilliant option for on-the-go touch-ups without sacrificing quality. If we were to recommend, this pen would be at the top of the list for travel or quick touch-ups at ours.