How does the bacteria in every probiotic drink reach or even survive till they reach the intestines if they have to pass through the stomach which contains stomach acid (hydrochloric acid) that can dissolve metal and possibly kill every microbes.

How does the bacteria in every probiotic drink reach or even survive till they reach the intestines if they have to pass through the stomach which contains stomach acid (hydrochloric acid) that can dissolve metal and possibly kill every microbes.