Wash before first use. The lid is safe for the top rack of the dishwasher. The tumbler body is hand wash only, no abrasives. Prolonged soaking is not recommended. Do not place in the microwave or freezer. This product is not intended for fermented or carbonated beverages. Always use caution when handling hot liquids. Do not close the lid if the tumbler contents exceed 165*F or 73*C.