I have a 19 month old girl. She was premi so she is a little behind on a couple things. Im getting really annoyed with her sippy cup. She can hold it she can drink out of it but she still holds it down and cant get anything so she hands it to me. When I give her things with a straw she tilts it up. Its driving me crazy and it is really annoying me. Any thoughts? I do have her hold it and I lift her arms but yea she isnt linking it together or she is being lazy.