Bottle sterilizer

Hello po. im only 7 mons. pregnant and starting to buy baby essentials para pagbalik s work wla n ko iisipin .. Do we need to sterilize feeding bottles every after use? I bought Dr. Brown microwave sterilizer pero wala kmi microwave ? hehe. ang plan ko buhusan nlng ng bagong kulo na tubig and will be steamed. okay na po b un?