I used to find the mag mag cups (by Pigeon) great for Jack, and the bonus was that you could use the same cup with both a straw and sippy top. But they have changed now and I don't like the spout top so much. Tom pretty much went straight to a straw cup which is common for bf bubs. We have a couple of different ones, but the big colored ones (I think they are Tommee Tippee) that you can get at Big W, Target, supermarkets etc are the ones we use the most. The take and toss ones you get at Big W and Woolies are good too, but Tom didn't really drink from one until he's mastered the straw cups. I think it can be trial and error as all bubs are different.