i run with a waist pouch with key, hp, power gel etc, feeling
uncomfortable, and shove the pouch into the inner lining of the
runner short and resolve the problem of having the pouch pounding
up and down. I do run with a high serra water bag, test it with run
for 5km(with 1 litres of water), find it pretty okay.
as long it suit you, it does not matter which method. 