So I've been offering water to LO via straw up since she was 10 months old...she seemed to like it A LOT better than the sippy cup. Well, she just turned one last week and yesterday I decided to try to make her go cold turkey on the bottles....put her 1/2 formula 1/2 WCM in her straw cup and success! She totally drank it without a fuss. We went all day yesterday with no bottles! Whoo hoooo! Can't wait to pack them away.....so sick of cleaning those darn Dr. Brown bottles.