Our favorite kitchen sponge is the Scrub Daddy and while the "eyes" and "mouth" might just look cute, they also serve functional purposes. As shown below, the "mouth" is used to safely scrub knives and can also be used for forks, spoons, and other utensils. You insert a couple of your fingers in the "eyes" to get a better grip, particularly useful when washing glasses and mugs. The texture of Scrub Daddy changes with water temperature, getting softer as the water gets warmer. With the Scrub Mommy, you get a scrubber on one side and a sponge on the other. After appearing on Shark Tank and striking a deal with Lori Greiner, the brand has sold over $200 million. The official product video is at this YouTube link.