It may be that she likes the time with you when you feed it to here. It may be comforting to her and remind her of the closeness you shared when breast feeding. She will eventually learn to tilt it up correctly and I don't think she's lazy.
You might try holding her while getting her to hold the bottle for a while... that way she still gets the closeness that she might want from you and you can just concentrate on reminding her tilt the bottle up to get the formula.
You could also try the sippy cups with straws... there are some with soft supple straws and those worked well with my daughter because she wouldn't tilt the bottle up, either, but she would suck on the straw just fine and get the liquids out. Nuby makes some that are available at Walmart that worked well for us.
Hang in there... they all learn eventually!