I have three main water bottles I use plus a camelbak reservoir that I don't really use because it's a pain in the ass to get into my backpack.
My favorite is probably the Klean Kanteen. Compared to the Nalgene I have it's a lot lighter, and I find it affects the taste of the water the least, plus it keeps it slightly cooler. On the down side, it dents somewhat easily. Not huge dents that make it unusable, but noticeable dents. It's also made in China. In terms of leeching chemicals into the water that will give me cancer or turn me into a he-she the envy of every troon, I estimate it's a medium. Again, it's made in China, but it doesn't have a coating like Chinese-made cookware does, plus by virtue of being metal light doesn't shine through it.
I have a standard Nalgene, it's pretty meh. It gets the job done, doesn't dent, and is made in USA, but it scratches easily, imparts a small taste to the water, and is somewhat heavy. It will probably last for years, but I don't know if I would keep drinking out of it for its entire lifetime. They got rid of the BPA in these, but who knows what else it leeches, and since I think all Nalgenes are transparent the UV can just go to town.
The last one I have is a Playtpus Softbottle. I really like how lightweight and flexible these are, you can stuff them into corners and around things if you're carrying a lot, or roll them up when they're empty. The one I have is made in USA, but some are made in Indonesia, so be careful. On the downside, it's not very durable, I've only had mine for 6 months and it's starting to peel apart. I think this one is the one slowly poisoning me the most, since it's a soft transparent plastic. I really wouldn't leave these in the sun for any amount of time, or use them much past a year.