Drinkware Product Care: All imprinted drinkware products are to be hand washed. Any exposure to the possible extreme temperatures and chemicals in a dishwasher will void any warrantee. There is also condensation or leakage that can occur in most double wall construction drinkware that will cause the moister to leak from product during use if washed in a dish washer. So hand washing is the only way to insure the intended performance and avoid moister or water from building inside the double wall insulation the drinkware provides.
