While it's hard to wax poetic over something as commonplace as a can opener, I really am in love with this clever tool from Kuhn Rikon. Cutting along the seam at the side of the can instead of on the top, the safety can opener leaves behind no sharp or jagged edges, while a small pinch grip lets you pull off the lid hands-free. No mess (the lid can't drop into the can, and the cutting wheel never touches the food) and the smooth edge means no chance for cuts.