We have a good reverse osmosis filter system under the kitchen counter with a spigot above at the sink, keep a few pitchers of cold water in the fridge at all times. Much better taste than tap water. I always hated lugging those gallons home from the store. Out on the road, or on the water, its poland spring pints.
I heard that refilling those bottles without a good cleaning is one of the worst things you can do, something to do with bacteria. The bottled water craze has been terrible for the environment also, even though many people recycle, there are billions of those bottles in landfills.