EBF baby wont take any kind of bottle!

Katy
My little one is almost 3 months and he has been exclusively breast fed from birth, ive tried pumping and giving him BM in at least 4-5 different bottles and he is completely uninterested. He doesnt even ATTEMPT to suck, just pushes it out of his mouth with his tongue and gets very mad. Luckily i take him with me to work otherwise this would be a bigger problem, but i take him with me everywhere so i havent made a big deal of it, but it would be nice to be able to leave him with dad for more than 2 hours every once in a while! Any reccomendations? Special techniques or special breast fed baby bottles?