All signature cups and accessories (including lids, caps, bases and straws) are top-rack dishwasher safe. For thorough cleaning, remove rubber gasket from lid. Clean and dry before reinstalling. Never use bleach or abrasive cleaners containing chlorine. Do not put in the microwave or the freezer. Do not overfill with hot liquids and keep out of reach of children when filled with hot liquids. Always make sure lid is tightly secured before drinking.