First and only time I did the - stick the cap to the bottom- the cap got bumped off by my pinkie, fell about 5 feet onto tile and rolled behind the bookcase. When I retrieved it, thankfully it wasn't damaged but covered in dog hair. Now it gets flipped over and set on the table while filling. Then I grab it off the table, all nice and dog hair free and pop it back where it goes- no cleanup required. even when I had to to the old school, multi step, tiresome crazy process of grabbing a paper towel and unscrewing a bottle cap to fill, I never had anything end up on the floor.