The bottom line? There isn’t one. If you choose to use plastics, stick with those labeled “microwave-safe” (but don’t allow plastic wrap to touch your food during heating). If you’re wary, use glass or ceramic dishes marked “heatproof” or “microwave-safe.”

Go for It!

Glass and ceramic dishesPaper plates, towels, and napkinsWax and parchment paper

Not So Fast

Aluminum foilBrown paper bagsCold-storage plastic containers (such as margarine, cottage-cheese, and yogurt tubs)Single-use plastic containersDishes with metallic paint or trimFoam-insulated cups, bowls, plates, and trays

Clean in 90 Seconds

To loosen your microwave’s splatters and stains in a flash, try this favorite Real Simple technique: Heat a bowl of water and lemon juice on high for 5 minutes, then wipe the oven clean with a solution made from 1 cup water and 1 tablespoon baking soda.