N.F.
Hi R.,
I am the mother of three grown daughters and one beautiful 4 year old granddaughter.
When my girls were really no longer interested in their bottle I just gave them a sippy cup.
Also, my little Graddaughter would do this when she had trouble with her sinuses and also when she had an ear infection - she was an excellent baby! However she never cried or gave any indication of an ear infection other then not wanting her bottle! It hurt her ears to suck on it. If this keeps up you might want to call your ped and ask if you should bring her in and get her ears checked. Also be careful that she does not get dehydrated from not getting enough liquid.
Good Luck!
N.