slow cooker which the inner bowl is made of clear glass

[Guest guest]

I will elaborate my question.

I want to prepare my food according to the principle of low heat/slow

cooking. Especially broth.

in oven - dosn't have less then 100 degree celsius.

in simmer - broth is still bubbling (boiling).

So I thought maybe electrical slow cooker is good.

Now, there is the question from what the inner bowl is made. Something

so acidic like broth,

increases the risk of leaching lead etc.

the slow cookers I saw so far are made from either ceramics,

ceramics+colored glaze or stoneware/pottery. All of them can leach

lead and/or aluminum silicate and such conditions.

I know glass conduct heat less good then ceramics. but I prefare this.

So my question is: do you know of a slow cooker which its internal

bowl is made of clear glass or at least the glaze is from clear glass?