Question: (UK) My girl is 11 months old and is now too big for her baby bouncer chair, which she really loves and it is convenient to put her in to keep her out of the way for a bit.

What comes next? Is there a larger baby bouncer for a 1-2 year old? Is there something else on the market? I think a larger bouncing chair would be ideal for her rather than just surrounding her with pillows.

Answer: 
If you're using BPA and Pthalate free bottles and nipples, then what we can say is that there's no known significant concern from doing so. It's impossible to say that there are *no* side effects, though,and there could well be other endocrine disruptors not yet known in the plastics (BPA after all was not known about immediately, either).

You will have to weight that for yourself, whether that is a risk worth taking. If your son has a hard time eating from other methods, it seems like that's more of a concern than a small risk from plastics, particularly if you can't afford glass or other options. 

Glass is likely the least concerning, as it's effectively inert silicon dioxide which is well understood. That's what we used (Glass bottles with silicon nipples); they're very easy to sterilize and easy to use. Just put a silicon sleeve around them to ensure they don't break as easily.

The claims of 'boosts immunity' are largely incorrect; metals don't do any such thing unless you are deficient in that metal. As far as cooling the body, I find that irrelevant (you don't want formula cool, you want it warm!). Being bacteria free is true to a large extent - it's easier to sterilize metal or glass than plastic, though glass is better (more scratch resistant; scratches can harbor bacteria or other things).
> 
> As far as I know, our elders are used this mainly because it is
>  bacteria free, boosts immunity, non toxic and cools the body - mainly,
>  it will retain and restores freshness of water and liquids.
> 
> 
> 

Boosts immunity? How? Cools the body? Huh? What is the mechanism by which silver "refreshes" a liquid? What does that even mean?

People were using it because it's what they had on hand, that's all.

BPA-free bottles are fine. Anything that gets the milk into the baby, and is easy to clean is fine. The paladai is fine too, IF it's working for you. But it certainly is not as magic as you described it.

Plastic bottles don't need to be sterilized (except before the first use), provided you have safe drinking water available for washing. Just washed in warm soapy water. Use boiling water one a week if you want, you don't have to do that every time.