Does anyone know why it is we can't have water 30 min before or after we eat?

yes because it overfills the pouch. Your tiny tummy can't accommodate both liquid and solids at once.

I can share what I was told. If you drink while or right after you eat, you will wash the food out of your stomach. If you drink right before you eat, your funnel is wet and food will not spend as much time in the stomach. Either way, you will get hungry too quickly.

I'm with mooncat. I asked my surgeon why, and he told me it's to keep food in the stomach longer, so we won't be hungry again as soon.

Thanks for the fedback. I forget to keep track of the time sometimes. I sure don't want to get hungry sooner than I should.

I keep a pencil and paper beside me, and jot the time down. Otherwise I'd lose track.