Belkin's Washable Mouse was tested by Gearlog, who did more than just get it a bit scuzzy. Instead, they submerged it in a day's worth of food—while still using it. The gauntlet: oatmeal, chili, pudding, and Cheetos. Because the scroll wheel is touch sensitive and the sensor on the bottom is optical, the entire unit is sealed.
These should be the product images on the box.