Say no to those single use coffee cups by opting for this reusable 340ml glass coffee tumbler, which has an insulating silicone band and a comfortable silicone sipping lid. wash care wash before first use dishwasher safe, top shelf only microwave safe Caution use with care when consuming hot beverages do not overfill ensure lid is secure before drinking do not hold glass filled with hot liquid without the silicone sleeve do not use glassware that is chipped or cracked Whilst this product is dishwasher safe, branding methods, other than laser engraving and sublimation, will not withstand dishwasher cleaning.