LO went on bottle strike a couple of months ago...She wont even allow a bottle near her lips so the idea of trying new bottles/nipples won't work. My mom has to keep her today and tomorrow and I'm wondering if I can put formula in a sippy cup but I don't know which ones have the ability to remove the "no spill" setting so it just freely flows? The easier it is for her, the better- we don't care about mess in these trying times!!!