S.G.
Hi K.,
Like you and many of the other moms who already posted, my daughter did not take to the sippy cup at first (or 2nd, 3rd, 4th...times). She didn't like the Gerber trainer or the Nuby and didn't seem to get how to drink out of it at all until my mom sent the Avent sippy cup trainer! It was great! It had several different nipple tops that went allowed her graduate up from bottle nipple to soft nipple like sippy cup spout to regular hard sippy cup spout. She will now take any type of sippy cup and has started drinking the straw sports bottles too (she didn't start doing that until about 20 mos. old) I am planning to start giving my 5 1/2 month old water in the trainer soon so that hopefully I won't have this problem again! It is very frustrating!!! I completely understand!!!
Good luck!!! Don't worry!