Juan, in my part of world (I am in combodia these days) they simply use carts to transport a bulk of drums at a time. Rollers are not popular here. But i saw this linkabout water kiosk you may like to read http://akvopedia.org/wiki/Water_vendor_/_Kiosk
I will post soon some details about a syphon method i have seen last time in India. (I will post some snaps if I have)