What happens when you mix eating and drinking together?
90 minutes seems really long to not drink after a meal. I would double check with him on that time. The most I have ever read is 1 hr. That amount of time I think will make it awefully hard to get all your water in in a day.
If you drink and eat at the same time you will also push your food through your pouch too fast, thereby making you hungrier faster. You may not be hungry at your point PO now, but the hunger does come back the further out your are. I had it come back big time at about 2 yrs out. Good luck.
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