Mothers who have ebf for more than a year

Mothers who have ebf for more than a year, how did you get your baby to stop after and when did you stop? My daughter is 14 months and i cant get herto take a sippy cup. She drinks from my about 3-4 times a day. I have tried the munchkins 360, nuby sippy cup, tommy tippy, straw cup and drinking out of a glass. I have tried pumped milk as well as whole milk. Will there be a time that she herself will wean off? What should i do? I need to get back to working and i dont know what to do.