Yes, they are. But different plastics can have varying levels of impact on those who come in contact with the bottle and in the environment.
Water Bottles in general: There’s a lot of persuasive information about how drinking water in plastic bottles affects your health- especially when heated up (think hot coffee, tea), but it often results in conjecture and speculation across various sources; we don’t know for certain if this is actually true because there hasn’t been enough research done to rule it out or deem it “true.” Like any major change to your lifestyle like dieting, drinking lots more water will require adjustments until you find what works best for you; trial and error helps identify which types of containers work best for drinking when heated.
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