Baby refusing bottle

Anyone experiencing this? No teething no fever...just out of the blue baby refusing milk bottle.... so now drinking is an issue. E.g. we tried all sorts of sippy cups, other brand bottles, etc.. but no success... baby currently drink slowly from straw (although still dun really know how) and spoon fed..... any tips? Any bottle or cup to recommend? Isn't it too early to wean off????? #help