Brush the glass, fill it with salt water, shake it a few times and let it sit for 5 hours or so,remember to turn the bottle upside down during the time.$Or find some strong flavor of tea with boiling water filled, after standing for an hour to brush clean can.$Or leave a lemon or orange in a cup for 5 hours to get rid of the smell.$Dual-purpose cup lid: The cup lid adopts a dual-purpose design, which is convenient for drinking. The PP material ensures the hygiene of the cup mouth.$Long Time for Holding Temperature ----Featured dual walls, premium coated copper on the exterior of the inner wall.