Let’s face it: Whitening strips can be messy, not to mention the cause of painful (nay, excruciating) tooth sensitivity. Who needs that? Avoid the pitfalls of scoring a squeaky-clean smile with this dentist-developed, clinically tested kit. As the name implies, it’s made for people who want whiter teeth in the here and now—without the risk of increased sensitivity. True to its promise, it delivers the bright-white goods in just two to three days.