the typical vascular cylinder of a dicotyledonous plant or a gymnosperm, consisting of a ring of collateral bundles of xylem, cambium, and phloem. Origin of eustele.
Tap water is fine in Barbados, go in any restaurant and they will ask if you want water then give a choice of bottled or tap. They wouldn't be doing that if the water was bad. It is one of the few places around the world that I will drink tap water. I certainly don't drink it in the UK.
But to answer the question, *no* I do not drink tap water in Mexico. I drink only bottled water, even use it for brushing my teeth. It's usually provided (in those large Sparklette style dispensers) or easily found at any corner store. I figure it's cheap insurance for a healthy vacation.