Using the sippy cup, finally!

I have tried off and on to get Gavin to use the sippy cup, without a lot of success, so I would forget to have him try it. We have also been leaving a bottle of water in his crib for him to drink at night, so today I'd thought I'd give the sippy cup a try. He knows he can drink from it, because I've given it to him without the valve a couple of times, but I can never seem to get him to drink it sitting up (he doesn't get he that he needs to hold it up to drink, he doesn't do it with the bottle, either, actually). It seemed to work with him laying down, though.