"What other brands should I turn to instead?"

I've been using the PET bottles for years. I'm talking about the ones that bottled water, pop and gatorade comes in.

I have some in my garden that have been filled with water and lying in the sun for 10 years. No problem. Only the cap eventually wears out.

I use them daily at the gym. I use several bottles and by rotating them can make sure they totally dry out between uses. I use the smell test to make sure nothing is going on inside them before each use.