Please note the tala glass jars can be sterilized in the oven for making preserves etcoven methodlay a double layer of newspaper on each oven shelf but not the floor of the oven arrange the jars on the shelf making sure the jars are not touching each other heat the oven to 350f180cgas 4 dont be tempted to heat the oven any higher the glass should heat with the oven do not place the glass jars in a hot oven the glass needs to heat with the ovenclose the oven door and sterilize the