I have had water in the original store-bought gallon jugs (sealed), and storage conditions make an incredible difference. As soon as plastic heats up, it seems to start giving a nasty taste to the water.

Around here, people have what they call "fruit rooms", like insulated pantries suitable for foods that have been home canned. I store most of my water there, and it tastes fine.

The weight of glass, plus the breakability factor wouldn't make it useful for many people, esp if they found themselves in an evacuation situation.

The soft drink bottles are P.E.T. plastics, and PET seems to be the best one for water storage. The soft milk bottle types seem (to me) to be the worst.

Sue