Thank you so much. I hope you are right..It becomes very fustrating. yes, I have tried multiple sippy cups..I am going to also buy the cups with straws in it... She isn't losing weight..but she isn't gaining either...She is very tall and thin, like her father . This morning i decided to not feed her jarred food first..I gave her her bottle, she took 2 oz and wanted nothing to do with it, and ate like 1/2 a jar of food. I know that ever since we started jar food at around 4 months, shes never been a fan of breakfast, she does much better with lunch and dinner. She wille at anything I eat, and will drink from my cups, but no a bottle or a sippy, and once she realizes i put formula in it, lips clench!, shes a smart cookie! I just want her to gain some weight and maybe eat some cookies .