Hi K.- think im a little late but figured id put my 2 cents in just incase you were still trying- my daughter was breastfed and didnt take a bottle or cup at all - the only thing we got her to take was the nuk, (you said you tried gerber but not sure if you had tried this gerber one) - anyways worked for us, i attached the linke below- they are at walmart, cvs, etc....
another thing we did is try something different in her cup than she normalyl drinks in her bottle, when we transitioned my little girl she was used to breastmilk so at first thats exactly what she got in her cup- no such luck,
when i woudl try water, juice, and as she got older vitamin d milk she would drink it,
it was something along the lines of she expected my milk to come in usual form btu because juice and water were new to her she would accept them however they came:)
http://www.drugstore.com/products/prod.asp?pid=165750&...