Product review (5 stars): No more water on the floor or ice in the bottom of the freezer.
This solves the water leaking onto the floor problem.  Removed the old (sticky) drain cap and installed this puppy.  Melted all the ice that had formed in, behind and below the metal fins behind the back panel of the freezer and ran some warm water through the drain tube to clear the ice in it and presto, problem solved.  Haven't seen any ice in the bottom of the freezer since.  Why Whirlpool hasn't sent all owners this tube free of charge is beyond me.  It's not hard to install at all but could be a pain for some gaining access to the metal fins and drain at the back of the freezer.