Hey moms my baby girl is 9 months and 1wk old and I'm trying to get her onto just the sippy cup but she has trouble holding them up so I decided to try and get the one with the straw cuz ur able to drink from any angle that way she wouldn't need to hold it up and I can not figure out how to get her to drink out if it! She only chews it r pushes it away because she gets aggravated that she isn't getting any. I watched videos on how to do it and nothing is working! Please some advice!!!!