It's tough work drinking from a cup.  It took Momma and Daddy about 30 mins the first night before I got a sip.  I've been working at it all week.  I can't really hold it up without help it's too heavy.  I don't like it in my mouth and regularly pull it out to look at it.  I've been laying in the floor drinking it some like my bottle, but I've not yet managed more than about half a bottle's worth.  I really didn't like juice at all, but I'm doing a little better drinking formula through the cup.