Melamine not safe for microwave

I bought Corelle dinnerwear for our r-pod and its been trouble-free for the past two years.  Its microwave safe and oven safe (to 400 degrees) and virtually indestructable.  I installed some wire corner shelves on their side to keep them organized in our upper cabinet.

We use heavy-duty "disposable" plates,  I think they are from Hefty.  We've been using the same set for years.  Same goes for the "disposable" utensils, we got the heavy-duty versions and wash them like the plates.  Very light, microwaveable, and if one does get damaged and must be thrown out its not big deal.

We bought melamine plates from Walmart last fall just before we drove out to get our pod and it does say Microwave Safe and Dishwasher Safe Top Rack Only.  There's a symbol that says "Not Oven Safe" so I guess that just means it's okay for the microwave as long as the food doesn't get too hot.  Our unit didn't come with a microwave so I haven't been able to verify whether the plates are truly microwave safe or not.  The plates and bowls were a great deal at 1.67@ compared to similar quality ones at the picnic/fancy housewares shops that were $8-18@. 

If we do add a microwave in the future, we would probably us a glass pyrex dish of some sort or Corelle dish for heating things up.

Our "melamine", microwave safe plates do work well in the microwave.  Putting hot food on them is no problem either.  We wanted just enough dishes to do the job and not one more.