Let's set up a hypothetical situation here: It's cold out, and you break out the slow ... glass lids from rattling or shattering, or that it equalized the pressure between the inside of the pot ...
Whether for measuring food temperature or letting steam out, the small holes are more than just an aesthetic feature.
Read more: 14 Never-Ending Food Debates While a glass lid solves most slow-cooking woes, there are a few other things you can ...