I had a friend give me one -- but it's also big enough for tortillas. I've used it for potatoes and it works fine. I don't normally use it cuz to me it's another thing to wash. I hold onto it so I can try it on tortillas -- some day.
I have one question --- how LONG did you put it in the microwave for?????? I've burned foods that are NOT in the bag just by putting the food in too long.....