There are lots of silly unnecessary kitchen gadgets, and while a can colander might seem to be one of them, it's actually surprisingly useful.  It brilliantly presses all the liquid out of tuna cans or drains it from canned fruit.  No fuss, no muss, no fishy smell on your fingers.  Look for one at your local kitchen supply store, or buy a plastic or stainless steel can colander from Amazon.com. (The Deluxe Model has a little magnet to cleanly lift lids out of tuna cans.)