Once again, lovely face; it really conveys the delicateness of a cat. I also like the hand holding the glass.
The kneeling leg doesn't read true for me, though. It doesn't look like it's supporting anything...or it looks like it isn't turned towards us enough. Another thing--it's hard to tell which leg is supposed to be in front of which. I do understand these are sketches, though...just some thoughts for next time. :)
my art: www.side7.com/art/daniwill
Very nice gestural drawing. Keep at it!