When my brother and I were growing up we had a plastic dog with a special dish. You'd fill the dish with water and his tongue would soak it up. Then he'd pee it out. YES, IT'S TRUE, LOL! We had a peeing dog toy! While visiting my brother this weekend I saw it's head peaking out of a box in his basement - he still had it. I brought it upstairs to take pictures of it and my niece fell in love with it.
Unfortunately the dish is long gone, not to mention the fact that my brother and I stuck things up his tongue plugging it forever.