Crooken caps but no leaks yet :)
The bottle caps don't fit on completely.  Some are crooked, but I have not had a leaking issue, so I like them!<br /><br />Update: I have used 2 of my 6 so far and I put them in my purse and take them everywhere with me.  I LOVE them.  No leaks, smooth roll on, they are perfect.
Rating: 4 stars