... protection of the environment Features for Double wall mug /travel mug/insulated mug/thermal mug/ double layer plastic cup: ... body, to prevent the heat of hot water.2. Matte surface to prevent the fall, feel comfortable 3. ... be leak-proof, anti-heat with 100 5. Double matte wall with simple, fashion and environmental design, made from ... , effective protection of the environment. portable cup/travel cup