promotional PP two layers custom made mug: 1,PP plastic inside 2,can be put insert ... 3,leakproof guaranteed 4,no leakage our custom made mug: PP two layers custom made mug:basic details: *capacity:350ml *pcacking:48pcs ... and keep fresh, Light,durable,easy to carry,.ยท It was made of high quality food grade plastic and no joint less ... free to contact with us! promotional PP two layers custom made mug