Some context: I’m in the market for baby bottles. Some manufacturers produce bottles which they state are plastic on the outside and glass on the inside, so the milk only touches glass when it’s inside the bottle. They explain it as a thin layer of glass that somehow binds to the outer plastic. And somehow it’s also unbreakable or shatter-proof.
The bottle itself has the flexibility of regular plastic, which is very odd to me, I usually expect anything made of glass to be completely stiff.
How is this possible?
Also… is there a way for me to know or somehow check if the inside of the bottle really is glass?
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Some glasses has a bit of flexibility like gorilla glass used on phone screen.
Still, it’s not much compare to what thin flimsy plastic can have.
Maybe that bottle has thick rigid plastic to match the flexibility?
I don’t think the manufacturer can get away with false ad so I assume it’s true… One way to test it is to pour acetone inside and see if internal surface melt. But there’s a risk that the vapor of it damaging any exposed plastic such as screw of the bottle.
Also there’s a thing called flexiglass that is actually acrylic resin(plastic) and people think it’s a glass. But it’s not food safe so I don’t think it’s the case.
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