No you can’t it will break. What I do is fill a huge full size heavy duty aluminum pan with water and then cover it with its own foil cover, it doesn’t work with plain foil because it is not strong enough. I heat up the water before shabbos and then leave it on “low”. The heat rising from the hot water is even hotter than a hot plate and all the food on it stays really, really hot. I even leave potato kugel overnight on it.
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