I remember several people have said that their cats like to play with the plastic cap of milk bottles. Recently, Ivo has been chewing on the top of my water bottle as if it's the best thing in the world (I keep a bottle of water next to my bed at night in case I get thirsty). I was thinking I'd give it to her when I buy a new bottle, but I'm concerned she'll choke or break her teeth or something (she's already missing one tooth). What experience do people have in this matter?