But for food heating I find it very easy to just take the food from whatever container it’s in and put it in a regular bowl which I can microwave covered by a plate to contain the inevitable food explosion.
Every one of the few times I microwaved even in high quality plastic containers they became soft and harder to handle. Also I always had the (probably very subjective) feeling that it subtly changes the taste of the food. Kind of how bottled water tastes when the PET bottle is left in the sun for a while.
Anyway, I find the bowl+plate as an infinitely reusable option, easy to clean, and just takes a bit of extra care handling when hot. Also bowls and plates stack very nicely in the cupboard and not too expensive in IKEA.