Stainless steel car mug/travel mug Double layer food-grade s/ ... and good effect of insulation.Food-grade antibacterial PP plastic.6. non-slip handle,prevent of slip and scald.7. ... ,it couldnt let water keep boiling. Plastic outer,and stainless steel inner . Convenience for drinking,and even in driving,the ... for cleaning ,and difficult for sliding on the car. Stainless steel car mug with handle