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I am worried about the plastic leaching into the water. Glass bottled water is so expensive.

me too, I have been drinking ONLY bottled water for about 4 years now.I drink a variety of different ones,because they list minerals in varying amounts...
The tap water here is fluoridated and I get stomach cramps very quickly if I drink any.It's a challenge to avoid it completely ,I shower &bathe in the fluoridated water and brush my teeth with it too..I use the bottled water if I need to cook anything like rice,etc.
I intend to get a top quality filter at some stage.I don't know how long I'll be living here though...