How do you live without your stomach?

I was wondering, after reading about this poor young woman who had her stomach removed to save her life after she drank a cocktail that contained liquid nitrogen:

"This girl is the victim of an irresponsible alcohol industry that's now competing on gimmicks. People should not be playing chemistry in public houses. This is a very, very cold substance and it is similar to subjecting your oesophagus and stomach to frost bite."...

[L]iquid nitrogen - which vapourises at -196C - has been increasingly used in recent years in the preparation of drinks. It is used to chill glasses and is a crowd-pleaser thanks to the dramatic-looking water vapour it releases at room temperature.

I found this article "Life without my stomach" about a women who, at the age of 27, opted to have her stomach removed because she had the gene for a form of stomach cancer that would kill her if she waited for it actually to develop, which was 90% likely, given the gene. So, then, how do you eat?

As my stomach had been cut out, part of my small intestine was joined directly to my stomach in what is called a Roux-en-Y reconstruction. Without a stomach, my food passed directly from my oesophagus into my small intestine.

With time, I was told, the body would adapt; the small intestine would make a small pouch where food could be stored a little longer (mimicking the stomach), before it continued on its way. It is one of the human body's remarkable survival mechanisms.

Weighing about eight stone, I could not afford to lose much weight. The doctors were concerned about this, so I went home with a feeding tube inserted into my bowel. It was attached to my body just above, and to the left, of my belly button with three little stitches and a plastic triangle. I was to hook it up to a machine each night, which would drip food into my bowel, bypassing the area on which I was operated. I never liked feeding that way because I always woke up feeling really full.

But I didn't have to rely on this for long. Soon, I was also managing to eat small amounts, which meant that I had to eat often. After experimenting, I found I could eat whatever I wanted, and it didn't seem as if there were any particular foods that were going to upset me. I have always enjoyed eating healthily, so I was happy I could still take pleasure in a bowl of fruit and yogurt in the morning.

Given that I was eating so well, it was not long before my feeding tube was removed. To this day, I am really lucky in that I can eat any foods I want. The only difference now is that I eat slightly smaller portions....

Sometimes adhesions cause intense pain and she has to stop eating and drinking and take painkillers and, if the pain doesn't end, go to the hospital. "I can't say this doesn't worry me; I really don't want to be a sick person." She's not yet able to live independently, and she wonders about having children, but only because the condition is genetic. "And, in response to the question as to whether I regret my decision to have my stomach removed, my answer is simple – no way."