Most modern dinnerware sets are microwave and dishwasher safe, can be warmed in the oven, and placed in the freezer. However, this isn't always the case, so it's best to check the manufacturer's instructions first to make sure you don't damage them. If your dinnerware set contains pieces with a metal accent, avoid microwaving them, and try not to clean them with citrus-based detergent, as this can damage the finish.