I want to buy an electric kettle. I found one of the kettle of pegion brand good (made up of stainless steel) but it's upper cover is made up of glass. Whether cover made up of glass is toxic or non toxic. Also tell me the company is saying it's made up of stainless steel. Should I blindly trust them about stainless steel thing (model-kessel multi kettle 1.2L and model no-ptekkmk 1.2L) is good for health or not?