I let my son use a sippy cup at 6 months when we're out and about, the Avent one with no handles... he played with it more than drank out of it, same with a bottle so I didn't bother with a bottle. A cup with handles may be easier though. At home I gave him a open plastic cup from 6 months too, holding onto the cup so he doesn't spill it..he drank a lot better from a cup and he enjoyed it more too.
Now when we're out he drinks from a normal water bottle.
You can try and see if your baby is comfy with a sippy cup. Sometimes it can take a couple of different sippy cups before your baby likes one