How to wash my Halo Lid? Although the Ceramic Halo Lid is machine washable, we recommend hand washing the lid (24k Gold and Black Chrome halo lids are hand wash only). Related articles Travel mug: Is my Ember safe to leave on charger? Travel mug: What is the rapid-cooling technology or phase changing material? Travel mug: What is the temperature range? Travel mug: How long can I expect my battery will last? Travel mug: Is my Ember dishwasher safe?