T he Member's Mark toilet paper from Sam's Club is a customer favorite. This is perhaps no surprise considering the quality ...

Applying the SpotLESS spray involves some intimacy with the toilet but significantly reduces effort later on. Photo: Jon Chase. A 5-ounce bottle costs an eye-watering $40, but context matters.

Dude Wipes’ potty mouthed founders have already grabbed 1% of the $11 billion U.S. toilet paper market. Now the Mark Cuban-backed startup is aiming to swipe up to 10%.