casper has this habit that started out almost cute when he was tiny, but now it is incessant and mischievous. he knocks over cups/glassess of water, juice, anything! he'll jump right up to them, tip them toward him, splash his paw quickly in any spillage, and run away. sometimes he hangs around to watch me clean up the mess he's made. he tips over empty cups too, but my guess is that he only hopes all cups are full of liquids. i thought maybe he likes playing water? but oddly, he doesn't play in his water bowl. any ideas how to change this behavior? i usually keep a glass of water by my bed at night on my night stand, but multiple times now it has ended up all over my pillow. now i'm using water bottles with caps on it for night, but during the day time i'd like to be able to use glasses without supervising my kitty!