Choosy Kids

My daughter is so choosy about her bottle nipple. She used to drink with a china brand bottle nipple but i recently changed it to Avent bottle nipple and she refused to drink her milk. I let her tried the new nipple for at least 5 times and each time she either don't drink her milk at all or she just couldn't finished it. I was so frustrate over her choosiness. When I exam the nipple carefully, I found that the Avent bottle nipple seems to be a bit harder compare to the China brand nipple. I should have continue to let her used the China Brand bottle nipple rather than changing it to the more expensive Avent brand, a lesson learnt :)
I bet in future, she will be choosy on what clothes to wear, what types of food to eat and so on...It has becoming more and more challenging as a parent when our children are growing up. It reminded me of what a friend of mine had said :" Kids are angels when they are small and become little monsters when they grow up" :-)