Is your bathroom cabinet filled with beauty products you've used once—and never again? Yeah, we thought so. To make sure your next purchase lives up to the hype, we gathered a team of seen-it-all experts and up-for-anything staffers to put a slew of innovative offerings to the test. From whitening teeth while washing dishes to flat-ironing hair at the beach (seriously), the trials are over and the results are in. Check out which of these goodies are worthy of your investment—and a spot on your shelf. Click the photo to see all of the products we tested!