Freezer paper is plastic coated on one side, which you wrap meat etc. for freezing. Plastic side towards meat. No, you don't want to use it in the oven. I wouldn't use it for lunch packing either, altho, I suppose in a pinch it would work. When you use freezer paper for quilting or crafty things, the plastic side can be pressed to fabric with hot iron, and it will stick to the fabric temporally. It won't leave a residue on the fabric, or damage it in any way. It's pretty great stuff. The kind I get comes on a roll and is from Reynolds. I get it at the supermarket. I understand you can get it in sheets at quilt stores. Someone stated it stuck to fabric a bit better, but I have not had any experience with that.