The OHOM Unity Products are dishwasher safe. However, certain parts containing wood, such as the lids of Leiph and Fondi, are not dishwasher safe. For mugs with custom-printed logos, we do not recommend placing them in the dishwasher, as the high heat and pressure may damage the logo ink. For Sio Glassware, it is not recommended to use the dishwasher, as the heat and high pressure may strip the smoky gradient finish. For Foree Dinnerware, it is also not recommended to use the dishwasher, as the high heat and pressure can strip the natural lacquer and cause the wood to deteriorate.