Can someone please share pros and cons of using stainless steel baby bottles?

I was so curious about it one time and so I asked the competitive sales lady in the mall. I learned the following cons: 1) they are unbreakable so you don't need to change it every time your baby throws tantrums and throws that bottle too! 2) efficient when you need to go out and keep your baby's milk or liquids hot or cold for a long period of time. Stainless steel bottles are usually thermal bottles. 3) they are recyclable and are the green way to go. However when I asked about the price here comes the cons: 1) they are way expensive than the normal plastic feeding bottles because you are paying for the technology or the innovative and chemical free products that are used to create them 2) heavier than normal bottles so baby might need to adjust about that. Ending: I just opted for chemical and BPA free plastic feeding bottle as I believe I'm still a traditional mom :D