Microwave safe and hormone free water bottle?

I don't know of any specific brands off hand, but your only choice if you want to be absolutely certain is a Glass Bottle. Others can link to the research (it's around this forum somewhere) but every type of plastic has been tested and proven to leach some type of hormone-like chemical. Some are way better than others (HDPE being one of the preferred) but under the right circumstances it seems like any kind of plastic will leach something. Your only other option would be a metal bottle (stick with stainless or titanium, aluminum bottles are lined with epoxys) but a metal bottle wouldn't make your microwave very happy.

Many will argue that the amount you get from a bottle made from HDPE or other BPA-Free plastics are perfectly safe. I would agree, as I don't think that they leach enough to matter. My wife disagrees has switched to a stainless bottle and removed 99% of the plastic from our kitchen. It's all about what your level of tolerance is. Hope you find something that works for you.

A health food store I used to work at stocked glass bottles with silicone sleeves:

https://www.lifefactory.com/catalog/classic-cap

If you want to take glass hiking, that's probably your best bet.

Or, glass at home, stainless steel on the trail. Sometimes one stone can't hit all the birds.

No water bottle out there leeches hormones.

Hormone disruptors maybe …

Behold: hormone leaching bottles.

Ben, did you read your article?

"may also pack a substantial quantity of estrogen-mimicking pollution"

"a chemical that turns on estrogen receptors in the body"

"is currently probing the particular agents responsible for the estrogenic response associated with PET bottles, but the “high activity” he witnessed “would seem in indicate we have a mixture” of hormone-mimicking pollutants."

I don't see any reference to "hormones" per se.

"Hormone-mimicking pollutants" I believe that is OP's concern, in looking for "hormone free" bottles.