There is a stainless steel drop lid now, but wooden products are popular even now because the handle does not get hot.
It is an indispensable lid for making Japanese style boiled food.
Put the drop lid in a pot and use it.
Choose a lid that is about 2cm smaller than the inner diameter of the pot.
Do not leave it wet. Get moldy. Deform.
Do not use the Dishwasher.